Adolf Fredriks kyrka ("The Church of Adolf Frederick") was built in 1768-1774, replacing a wooden chapel from 1674, which was dedicated to Saint Olof. René Descartes was first buried to the cemetery in 1650 (before his remains were moved to France). Inside the church is a memorial to the memory of Descartes installed by Gustav III. Other famous people buried in the church cemetery include Swedish Prime Minister Olof Palme who was assassinated only a block from the church, as well as Prime Minister Hjalmar Branting.
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The Temple of Portunus or Temple of Fortuna Virilis ('manly fortune') is one of the best preserved of all Roman temples. Its dedication remains unclear, as ancient sources mention several temples in this area of Rome, without saying enough to make it clear which this is.
The temple was originally built in the third or fourth century BC but was rebuilt between 120-80 BC, the rectangular building consists of a tetrastyle portico and cella, raised on a high podium reached by a flight of steps, which it retains.
The temple owes its state of preservation to its being converted for use as a church in 872 and rededicated to Santa Maria Egyziaca (Saint Mary of Egypt). Its Ionic order has been much admired, drawn and engraved and copied since the 16th century. The original coating of stucco over its tufa and travertine construction has been lost.