15th century

In the 14th or 15th century, Le Mans built a bastion to strengthen a weak point in their city walls. Unfortunately, this did not save them from a siege by the English in 1425.

Located in the western outskirts of Albuquerque, Petroglyph National Monument is one of the largest petroglyph sites in North America. It contains 17 miles of volcanic rock escarpment with over 25,000 petroglyph images.

Bridge over the River Fowey. C15, with later alterations ; there was a bridge at Respryn by 1300. The bridge has five arches of different sizes and dates. The central arch is the oldest, with 4-centred arch, with granite arch- ring.

Begun in 1389 and never finished, San Petronio is the pride of Bologna and one of the largest churches in the world. It overlooks Piazza Maggiore in the heart of the city and contains many notable Bolognese artworks.