The Basilica of Santa Maria del Canneto, or Santa Maria Formosa, was a sixth-century Byzantine church erected in Pola under the patronage of Maximianus, bishop of Ravenna. The structure was damaged at the time of the Venetian sack of Pola in 1243, and building material was subsequently taken from the ruins and primarily incorporated into the Marciana Library and the Basilica of Saint Mark in Venice. Of the large, triple-nave church, comparable in splendour to the Euphrasian Basilica in Parenzo, only one of the lateral chapels survives. It constitutes the sole construction in Pola dating to the Byzantine period.

Pula, also known as Pola, is the largest city in Istria County, Croatia, and the seventh-largest city in the country, situated at the southern tip of the Istrian peninsula in northwestern Croatia, with a population of 52,220 in 2021. It is known for its multitude of ancient Roman buildings, the most famous of which is the Pula Arena, one of the best preserved Roman amphitheaters. The city has a long tradition of wine making, fishing, shipbuilding, and tourism. It was the administrative centre of Istria from ancient Roman times until superseded by Pazin in 1991.