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View looking north at the two original bronze doors of the entrance to the Temple of Romulus. Note the two porphyry columns that flank the door. The decorative elements of the doorposts and the lintels are visible if you download the image at "Max Size Available."
This circular Temple of Romulus was thought to have been dedicated to the son of Maxentus who died in 309, but this identification is disputed. It is not known to which deity, or person, it was dedicated. Note the cupola on the roof.
This temple serves as the vestibule for the church of Santi Cosma e Damiano (behind it). The church was dedicated in 527 to two brothers from Cilicia, in Turkey, who were miraculous healers.