rundtempel

Forum Boarium: Temple of Hercules Victor (or Olivarius) by ortygia on Flickr.

Via Flickr:
The Round Temple (Rundtempel) along the Tiber River in Rome, in the area of the Forum Boarium. The temple is a centrally-planned tholos type, one of the earliest structures in Rome to have been built of marble, in this case imported Pentelic marble from Greece. It is also one of the earliest Corinthian temples in Rome; the cella is surrounded by twenty columns. Probably dedicated to Hercules, with the epithet Victor or Olivarius. No blocks of the entablature survive. Another well-preserved temple from this period is the so-called Temple of Vesta at Tivoli.
The most important monograph on the temple is:
F. Rakob and W-D Heilmeyer, Der Rundtempel am Tiber in Rom (Mainz am Rhein 1973)

Corinthian Capitals from the Temple of Hercules, Rome by ortygia on Flickr.

Via Flickr:
Two Corinthian capitals from the Temple of Hercules in the Forum Boarium of Rome. These appear to be Heilmeyer’s Group B/C of the Tiberian period. That is, later replacements of the original Pentelic capitals those here are of Luna marble).
The most important monograph on the temple is:
F. Rakob and W-D Heilmeyer, Der Rundtempel am Tiber in Rom (Mainz am Rhein 1973)