Maerten van Heemskerck, The Piers of the Cross Vault of New St. Peter’s Basilica and the Rest
Maerten van Heemskerck, The Piers of the Cross Vault of New St. Peter’s Basilica and the Rest of the Northern Transept of the Old Basilica. Roman Sketchbook I (1532-1536). Pen and ink on paper. Staatliche Museen, Berlin. -- source link
#drawing#architecture#architectural drawing