Constanta is Romania's largest and most important port on the Black Sea. Founded in 600 BC it was known historically as Tomis. It is the oldest continuously inhabited city in Romania. Tomis was eventually captured by the Romans in 29 BC and later renamed in honour of the half-sister of Emperor Constantine the Great.

After becoming part of the Bulgarian Empire for five centuries, Constanta fell under Ottoman suzerainty in the 15th century. In 1878 following the Romanian War of Independence, Constanta was ceded to Romania and became the country's largest sea port. During World war II the city was a main target for the Allied bombers and while the town was relatively unscathed, the port suffered extensive damage, recovering only in the 1950's.

In summer Constanta is the gateway to the country's seaside resorts, attracting countless visitors to the mineral springs in the surrounding area. There are some superb museums and restaurants, as well as a picturesque promenade along the harbour.

The large main square is named after Ovid, the Romanian poet who was exiled to Constanta. A statue of him stands before the excellent museum of Natural History and Archeology.

Another highligt of Constanta is the Art Nouveau-style casino with wonderful views of the Black Sea.

The Hünkar Mosque (Romanian: Geamia Hunchiar; Turkish: Hünkar Camii, lit. "Sovereign's Mosque") is a mosque located at 41 Tomis Boulevard in Constan?a.

The mosque was completed in 1869, nine years before Northern Dobruja became part of Romania, during the reign of Ottoman Sultan Abdulaziz. Hence, it is also known as the Aziziye Mosque, and his tughra features on the left side of the entrance, within an oval medallion of marble. The minaret is 24 meters high, dominating its surroundings. The building is in a simple Ottoman style, with a tile roof, and is cube-shaped like the Kaaba. It is made of carved stone that came from the entrance gate to the Ottoman fortress, the walls of which were demolished in 1828. In turn, the stone for those walls came from the Greco-Roman vestiges of ancient Tomis. The interior carpet was donated in 2001 by Turkish President Ahmet Necdet Sezer.

During the interwar period, the mosque came close to demolition, with proponents arguing that the structurally weak minaret posed a threat to passersby. Historian Nicolae Iorga successfully refuted this claim. During World War II, Soviet bombing seriously damaged the mosque, and its total razing was again suggested. It underwent restoration in the years after the Romanian Revolution, at the same time becoming choked by new construction in the neighborhood.

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The Genoese Lighthouse  is a lighthouse and historic monument situated on the waterfront of the city of Constan?a behind a group of statues which has in its center the bust of Mihai Eminescu, sculpted by Oscar Han. The lighthouse stands approximately eight meters high and is rectangular at its base to a height of about three and a half meters, and is octagonal above that. The interior of the lighthouse is cylindrical, with a spiral staircase in stone. The structure itself stands upon a pedestal base consisting of two steps, and is finished at the top with brackets supporting the eaves, upon which the metal housing of the lantern room also forms the roof.

The original lighthouse was built around 1300 by the Genoese who traded at the port, to guide ships at sea from a range of about two nautical miles out to the small port of Constan?a. It was rebuilt between 1858-1860 by French-Armenian engineer Artin Aslan, by order of the British-owned Danube and Black Sea Railway Company, to honor the Genoese merchants who established a flourishing sea trade community.