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Photo: Adrian Pingstone (Arpingstone), Public domain via Wikimedia Commons
An ancient Egyptian obelisk brought to Rome in 10 BC.
The Obelisk of Montecitorio, also known as Solare, is an ancient Egyptian, red granite obelisk of Psamtik II from Heliopolis. Brought to Rome with the Flaminio Obelisk in 10 BC by the Roman Emperor Augustus to be used as the gnomon of the Solarium Augusti, it is now in the Piazza Montecitorio. It is 21.79 metres (71 ft) high, and 33.97 metres (111 ft) including the base and the globe.
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Where you can find the building of the House of Representatives.
The temple of the Emperor Hadrian was consecrated in 145 AD by Emperor Antoninus Pius. The remains of the antique temple were incorporated into a new building that served as the Papal Customs House. It was finished around 1690 and today accommodates the Stock Exchange (Borsa).
Between the Pantheon and Via del Corso. A stunning example of Baroque art. The ceiling frescoes are especially fine, including a trompe l'oeil dome by the master Andrea Pozzo.