Detail from the Pianta Grande di Roma, now universally known as the Nolli Map, by Giambattista Nolli. Nolli began surveying in 1736 and engraved the map in 1748.
Using a figure-ground representation of built space with blocks and building shaded in a dark poché, Nolli represents enclosed public spaces such as the colonnades in St. Peter’s Square and the Pantheon as open civic spaces. The map was a significant improvement in accuracy, even noting the asymmetry of the Spanish Steps. The map was used in government planning for the city of Rome until the 1970s. (Source: Wikipedia)
My class is using this to figure out the changes since the 1870s.
Sant’Eligio degli orefici, dome on Flickr.
Raphael’s only surviving building. Renaissance perfection. Hard to visit - the church is never open except for scheduled events (it’s mainly used as a conference hall, now). Try banging on the door with the Orefici sign (gold workers) and tipping the attendant - since we were a group we had a reservation.