17/08/2026
Look closely at the walls of San Nicola in Carcere and you can see a Roman temple hiding inside a medieval church.
The church stands beside the Teatro di Marcello, on the site of the ancient Forum Holitorium, Rome’s market for vegetables and other produce. In the Republican period, three temples stood here, dedicated to gods including Janus, Spes and Juno Sospita. When San Nicola was built in the Middle Ages, the ancient buildings were not cleared away. They became part of the new church.
The clearest evidence is outside. Rows of ancient columns are still embedded in the church’s side walls, with their shafts and sections of entablature visible between the later masonry. Three more columns from the central temple appear in the façade. What looks at first like an eccentric medieval building is actually preserving the outlines of Roman temples in plain sight!