Serbian soldiers stand guard during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Serbian soldiers stand guard during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Serbian soldiers carry the coffin of Serbian Orthodox Bishop Nikolai during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of the bishop, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Serbian soldiers carry the coffin of Serbian Orthodox Bishop Nikolai during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of the bishop, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Serbian soldiers stand guard during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Priests of the Serbian Orthodox church attend a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Priests of the Serbian Orthodox walk along a street during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Serbian soldiers stand guard during a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Believers of the Serbian Orthodox attend religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Porfirije, the patriarch of the Serbian Orthodox Church leads religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Porfirije, the patriarch of the Serbian Orthodox Church leads religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Priests of the Serbian Orthodox church attend a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Priests of the Serbian Orthodox church attend a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Nuns of the Serbian Orthodox church attend a religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Porfirije, the patriarch of the Serbian Orthodox Church leads religious procession Spasovdanska litija in Belgrade, Serbia, May 25, 2023. Porfirije conducted the service near the Vladislav Ribnikar school, where a teenage boy killed 9 students and a security guard on May 3. Thousands turned out in the procession for the Feast of the Ascension, in which the remains of Serbian Orthodox Bishop Nikolai, who was canonised as a saint in 2003, were also carried in a covered coffin. REUTERS/Marko Djurica 

Believers take part in the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Believers take part in the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Believers take part in the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Priests take part in the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Believers take part in the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Priests take part in the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

People sit on a bench during the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

A man sits on a bench during the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

A woman looks at the burning candles during the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

Serbian Patriarch Porfirije leads the midnight Orthodox Easter holy liturgy at St. Sava temple in Belgrade, Serbia, April 15, 2023. REUTERS/Marko Djurica 

A person holds a candle as Serbian ultra nationalists gather in front of Holy Trinity Russian Orthodox Church in support of Russia and to demand the release of activists from jail following protests last week, in Belgrade, Serbia, February 24, 2023. REUTERS/Zorana Jevtic 

Serbian ultra nationalists pray and light candles as they gather in front of Holy Trinity Russian Orthodox Church in support of Russia and to demand the release of activists from jail following protests last week, in Belgrade, Serbia, February 24, 2023. REUTERS/Zorana Jevtic 

Serbian ultra nationalists pray and light candles as they gather in front of Holy Trinity Russian Orthodox Church in support of Russia and to demand the release of activists from jail following protests last week, in Belgrade, Serbia, February 24, 2023. REUTERS/Zorana Jevtic 

Serbian ultra nationalists pray and light candles as they gather in front of Holy Trinity Russian Orthodox Church in support of Russia and to demand the release of activists from jail following protests last week, in Belgrade, Serbia, February 24, 2023. REUTERS/Zorana Jevtic 

Serbian ultra nationalists pray and light candles as they gather in front of Holy Trinity Russian Orthodox Church in support of Russia and to demand release of activists from jail following protests last week, in Belgrade, Serbia, February 24, 2023. REUTERS/Zorana Jevtic 

Serbian Orthodox believers walk through the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers hold a flag of the self-proclaimed Donetsk People's Republic (DPR) as they stand in the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

Serbian Orthodox believers light flares as they stand in the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers stand in the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers kiss the wooden cross as they stand in the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers enter the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers gather before entering the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers sing patriotic songs and wave flags as they stand in the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

Serbian Orthodox believers sing and wave flags as they stand in the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

A Serbian Orthodox priest blesses the believers before they enter the cold water of the Sava Lake during Epiphany celebrations in Belgrade, Serbia, January 19, 2023. REUTERS/Marko Djurica 

A person burns dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

Believers light candles in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

Serbian priests prepare to burn dried oak branches, which symbolise the Yule log, on Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic TPX IMAGES OF THE DAY 

A person burns dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

A person burns dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

Believers burn dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic TPX IMAGES OF THE DAY 

Believers burn dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

A person burns dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

Believers burn dried oak branches, which symbolise the Yule log, on the Orthodox Christmas Eve in front of the Saint Sava temple in Belgrade, Serbia, January 6, 2023. Serbian Orthodox believers celebrate Christmas on January 7, according to the Julian calendar. REUTERS/Zorana Jevtic 

Serbian President Aleksandar Vucic and Serbian Orthodox Church Patriarch Porfirije (not pictured) speak to media after their meeting, as Kosovo Serbs keep blocking the roads in Northern Kosovo, in Belgrade, Serbia, December 27, 2022. REUTERS/Marko Djurica 

Serbian President Aleksandar Vucic and Serbian Orthodox Church Patriarch Porfirije speak to media after their meeting, as Kosovo Serbs keep blocking the roads in Northern Kosovo, in Belgrade, Serbia, December 27, 2022. REUTERS/Marko Djurica 

Serbian President Aleksandar Vucic and Serbian Orthodox Church Patriarch Porfirije speak to media after their meeting, as Kosovo Serbs keep blocking the roads in Northern Kosovo, in Belgrade, Serbia, December 27, 2022. REUTERS/Marko Djurica 

Serbian President Aleksandar Vucic and Serbian Orthodox Church Patriarch Porfirije (not pictured) speak to media after their meeting, as Kosovo Serbs keep blocking the roads in Northern Kosovo, in Belgrade, Serbia, December 27, 2022. REUTERS/Marko Djurica 

Serbian President Aleksandar Vucic (not pictured) and Serbian Orthodox Church Patriarch Porfirije speak to media after their meeting, as Kosovo Serbs keep blocking the roads in Northern Kosovo, in Belgrade, Serbia, December 27, 2022. REUTERS/Marko Djurica