The Sistine Chapel is the long, horizontal room near the top– the one with the insane floor. The room to the right with the patterned floor is the Sala Regia (Regal Hall). And below that is the Pauline Chapel. In the upper right, the map runs into the Apostolic Palace, which I’ll draw the rest of in the future. For now, I’m going to get this colored.
Let me know what you think so far!
Also, if you want to see the rest of the Vatican City maps I’ve made so far, you can find them all here.