Jigsaw puzzle of the Basilica of Saint Mary of the Flower which is the cathedral church of Florence, Italy. It was built in the Gothic style of architecture and has the largest brick dome ever constructed.
I've been lucky to have been to Florence twice. You really need to see the Basilica to appreciate the size. I believe they have pedestrianized the surrounding streets since I went - very difficult to cross the road before. Lovely views of the city from the village of Fiesole in the hills.
I would have loved to have visited here when I could afford (fiscally and physically) to have gone. Italy can take quite some time to see much of it that most people would want to see - Naples, Rome, Venice, Milan, Genoa, Tuscany, Florence, etc.