Piazza Navona, Sant'agnese in Agone
Campo Marzio, Rome, Italy
( 1653 to 1655 )
Architects: Carlo Rainaldi, Francesco Borromini, Girolamo Rainaldi, Antonio del Grande, Giovanni Maria Baratti.
Some useful links: Archinform , Vitruvio.ch , Wikipedia , Romaviva
Sketch: Michael Graves
We would like to thank Russell Fernandez for sharing the sketch, from the new book Michael Graves; Images of a Grand Tour published by Princeton Architectural Press



