Tradition dates the dedication to 497 BC, though the article says ancient writers disagreed greatly about the site's history. Construction began under Tarquinius Superbus, and the consul Titus Larcius inaugurated it, making it the oldest Republican temple after the Temple of Jupiter Optimus Maximus. Munatius Plancus rebuilt it completely in 42 BC.
The present ruins are the third phase, built after a fire in 360 AD, though the article elsewhere calls it a late 4th-century rebuilding. Only the front porch stands, with eight columns. The Ionic capitals are Late Antique, and the shafts are reused Egyptian granite. The podium is concrete faced with travertine. An inscription on the pediment records that the Senate and People of Rome restored the temple after a fire.
The temple held the aerarium, the state treasury, with state archives and an official scale for weighing metals. The article gives no dimensions or visitor information.

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