1.
Forum of Nerva, Puteal Albani
2.
Southern transept during construction of new St. Peter's
St. Peter's and the Vatican Palace
View of the Forum Romanum from the Palatine Hill
Old and New St. Peter's
Palazzo Senatorio
View of the Forum Romanum from the Capitoline
Inside the main aisle of Old St. Peter's with a view of the new construction
Piazza San Pietro
Temple of Serapis on the Quirinale at midday, view of the grand staircase from the south: Sketchbook II, folio 81v-82r