The 'Fluegelauto' (winged car) by German artist HA Schult is lowered by a crane to the top of Cologne's historic armoury April 4, 2013. The Fluegelauto, a 1989 Ford Fiesta, returned to the roof of Cologne's city museum on Thursday in front of the famous Cologne cathedral after it has been renovated by the trainees of car maker Ford at its Cologne car plant. REUTERS/Wolfgang Rattay (GERMANY - Tags: TRANSPORT ENTERTAINMENT)