Elevation Showing the Exterior of Saint Peter's Basilica from the South as Conceived by Michelangelo (published in 1569), from "Speculum Romanae Magnificentiae"

St. Peter's, from "Speculum Romanae Magnificentiae"

Giovanni Ambrogio Brambilla, After Michelangelo Buonarroti, Claudio Duchetti, Antonio Lafreri

St. Peter's, from "Speculum Romanae Magnificentiae"

Etienne DuPérac, After Michelangelo Buonarroti, Claudio Duchetti, Antonio Lafreri

Longitudinal Section Showing the Interior of Saint Peter's Basilica as Conceived by Michelangelo (published in 1569), from "Speculum Romanae Magnificentiae"

Etienne DuPérac

St. Peter's, from "Speculum Romanae Magnificentiae"

After Antonio da Sangallo, the Younger, After Antonio da Labacco, Antonio Salamanca

Design for the Basilica of St. Peter's in the Vatican, from "Speculum Romanae Magnificentiae"

After Antonio da Labacco, After Antonio da Sangallo, the Younger, Antonio Salamanca

Antonio da Sangallo's project for St. Peters, plan of the façade extended to the left with a tower

After Antonio da Labacco, Antonio Salamanca

Cross-section of the church of Sant'Andrea al Quirinale, Rome, showing lantern, cupola, and altar

Giovanni Francesco Venturini

View of the exterior of St. Peter's Basilica in the Vatican, from Vedute di Roma (Roman Views)

Giovanni Battista Piranesi

The Pantheon exterior (Veduta del Pantheon d'Agrippa oggi Chiesa di S. Maria ad Martyres)

Giovanni Battista Piranesi

The Pantheon, from "Speculum Romanae Magnificentiae"

Anonymous, After Nicolas Beatrizet

View of the Pantheon of Agrippa, today S. Maria ad Martyres, from Views of Rome

Giovanni Battista Piranesi

View of the exterior of St. Peter's Basilica in the Vatican, from Views of Rome

Giovanni Battista Piranesi