A neat little urban surprise: Chiesa San Fillipo in Cortona. The building below houses a church. The church is located deep within the building, and it is wrapped with apartments. The entry into the church is in the middle.
Below is the other side of the building. Note the dome, almost hiding. From outside the city, the dome is much more prominent.
And inside is this. The building is so nondescript that one would never guess such an inspiring space is within.