A particularly robust approach to Rome's antique past was taken in the Middle Ages, spanning from the Late Antiquity in the fourth century, until roughly the thirteenth century AD. The Spolia Churches of Rome looks at how the church-builders treated the architecture of ancient Rome like a quarry full of prefabricated material and examining the cultural, economic and political structure of the church and how this influenced the building's design. It is this trend of putting old buildings to new uses which presents an array of different forms of architecture and design within modern day Rome.