October 24, 1969, Mr. John Hardy, a drawing dealer from London, showed me a pen and wash drawing of this identical design but not quite so finished in its detail and also smaller in size (159 x 209 mm).
Inscribed on verso, in brown ink, "Pio Panfili del. [17]57".
Perera, Armando, former owner.
Fatio, Edmond, 1871-1959, former owner.
Oenslager, Donald, 1902-1975, former owner.
Architektur- und Dekorations-Zeichnungen der Barockzeit aus der Sammlung Edmond Fatio, Genf: Austellung in der Graphischen Sammlung der Eidg. Techn. Hochschule in Zürich, 1. VI.-3 VIII. 1946. Zürich : Die Sammlung, 1946, no. 76, repr.