The Patriarchal Basilica of Aquileia is part of one of the greatest unexcavated archaeological reserves of its kind. It is built on the remains of two different churches: a 5th century, three-nave Early Christian basilica (subsequently destroyed) and a church dedicated to Our Lady of the Assumption.Since its beginnings, the Basilica was rebuilt in the 11th century, and massive additions and embellishments were made during various periods, resulting in a magnificent showcase of architectural and religious history. In this model, get close-up access to the 4th century mosaic floors full of Christian symbolism. In the apse, view 10th century frescoes of Mary and Mark the Evangelist.Aquileia was one of the largest and richest cities in the Roman Empire, and then a dominant hub in Central Europe until the 18th century. The Archaeological Area and the Patriarchal Basilica of Aquileia were declared a UNESCO World Heritage Site in 1998.Continue exploring with a tour of the Cathedral’s exterior.