For this week's triangle theme, I'm showing some rooftops and facade of buildings in Europe. This first photo is the triangular roof of the bell tower of St. Mark's Basilica in Venice, Italy.
This photo is of the top of St. Peter's Basilica in the Vatican. This triangle eave is in the center of the basilica. You can see a part of the dome in the background.
You can see the triangle roof of the Basilica of Constantine behind this
palace. This is located in Trier, Germany.
These wood frame buildings with triangle designs can be found in Petit France in Strasbourg.
This last photo is of Burg Eltz in Southwestern Germany. (Burg = castle). This castle has a lot of triangular roofs.