Tower of Santa Maria in Cosmedin
"Tower of the Early Christian Basilica of S. Maria in Cosmedin at Rome." Santa Maria in Cosmedin (or de Schola Graeca) is a basilica church in Rome. The church was built in the 6th century over the remains of the Templum Herculis Pompeiani in the Forum Boarium and of the Statio annonae, one of the food distribution centres of ancient Rome.
A. Rosengarten, W. Collett-Sandars A Handbook of Architectural Styles (New York, NY: Charles Scribner's Sons, 1895)