Ancona is a city and a seaport in the Marche region in central Italy, with a population of around 101,997 as of 2015. Ancona is the capital of the province of Ancona and of the region. The city is located 280 km (170 mi) northeast of Rome, on the Adriatic Sea, between the slopes of the two extremities of the promontory of Monte Conero, Monte Astagno and Monte Guasco.

Ancona is one of the main ports on the Adriatic Sea, especially for passenger traffic, and is the main economic and demographic centre of the region.

Ancona Cathedral, dedicated to Judas Cyriacus, was consecrated at the beginning of the 11th century and completed in 1189. Some writers suppose that the original church was in the form of a basilica and belonged to the 7th century. An early restoration was completed in 1234. It is a fine Romanesque building in grey stone, built in the form of a Greek cross, and other elements of Byzantine art. It has a dodecagonal dome over the centre slightly altered by Margaritone d'Arezzo in 1270. The façade has a Gothic portal, ascribed to Giorgio da Como (1228), which was intended to have a lateral arch on each side. The interior, which has a crypt under each transept, in the main preserves its original character. It has ten columns which are attributed to the temple of Venus. The church was restored in the 1980s.

The Arch of Trajan is a marble structure 18 metres (59 feet) high, but only 3 metres (9.8 feet) wide, standing on a high platform approached by a wide flight of steps, and is one of the finest surviving Roman monuments in the Marches. It was built in the year 114/115 as an entrance to the causeway atop the harbour wall and is named in honour of Trajan, the emperor who made the harbour. Most of its original bronze ornaments have disappeared. The archway is flanked by pairs of fluted Corinthian columns on pedestals. A pediment bears inscriptions. The format is that of the Arch of Titus in Rome, but made taller, so that the bronze figures surmounting it, of Trajan, his wife Plotina and sister Marciana, would figure as a landmark for ships approaching Rome's greatest Adriatic port.