The Trevi Fountain is a masterpiece. As the largest Baroque fountain in Rome, it is a popular tourist spot, and about €3000 worth of coins are thrown into the fountain each day.
The theme of Trevi Fountain is the taming of the waters. There are many aquatic mythological personalities carved from the stone: Oceanus - the personification of the Sea - stands at the center, with Tritons guiding his shell chariot and taming hippocamps. Abundance, spilling water from her urn, and Salubrity, with a snake drinking from her cup, stand at Oceanus' sides. The fountain is symmetrical in a sense, but the characters have very extreme poses and expressions that break from the rigidity of composition and give the impression they were petrified while moving.
I saw the Trevi Fountain again in 2015 as it underwent restoration sponsored by Fendi. Even though the plaza was closed, the main sculptures were still visible and I was able to take a few pictures.
Santi Vincenzo e Anastasio is a Baroque catholic church that lies at the opposite side of Piazza Trevi from the fountain. The two-storied corinthian columns make it appear taller than it seems. The enteblatures above each column are arched, angled, or broken, so it never seems to be perfectly straight, which is a very curious design. To no one's surprise, this style hasn't been imitated much.
The architecture isn't the only thing that is off in Santi Vincenzo e Anastasio, as this church houses the embalmed hearts and precordiums of 22 catholic popes. To be honest, that seems a little vein.
Also in the vicinity of Trevi Fountain lies Santa Maria in Trivio, a catholic church dedicated to Mary the mother of Jesus (who else). This church is really old, apparently founded by Byzantine general Belisarius to atone for deposing Pope Silverius in 537. The architect Giacomo del Duca rebuilt the church during the 1570s. Located in Piazza dei Crociferi, this church seems to be a part of a much older Rome than the buildings that envelop it.
Overall I must say that I quite liked the Trevi rione. There was a lot to see in this district, as buildings from different centuries coexist. Of course, the fountain outshines them all, and will probably remain as one of my favorites. Lastly, I must advise that those who do visit Trevi Fountain need not be tempted by the high-income flow of coins, since it is illegal to pocket them.