This morning we visited Aquileia, or more precisely the historic basilica there. The original church dates back to the 4th century, and there are some mosaics near the bell tower based that are probably from that era. The main part of the church is from the 11th and 14th centuries. While working on the church, they discovered beautiful mosaics under many more recent floors. Behind the church is the the Crypt of Frescoes with beautifully painted frescoes.
In 2000, they built a glass walkway, so people would not have to walk on the mosaics. The glass walkways were nicely designed and don’t touch the mosaics at all. In the main part of the church, they are supported by the columns. In an underground portion, the glass walkways are supported by steel wires attached to the ceiling.