Basilica di Santa Maria Assunta (Italian: Basilica Patriarcale di Santa Maria Assunta) is the principal church in the town of Aquileia, in the Province of Udine and the region of Friuli-Venezia Giulia, Italy.

The façade, in Romanesque-Gothic style, is connected by a portico to the so-called Church of the Pagans, and the remains of the 5th-century baptistery.

Next to the 11th-century Romanesque chapel of the Holy Sepulchre, at the beginning of the left aisle, flooring of different ages can be seen: the lowest is from a Roman villa of the age of Augustus; the middle one has a typical cocciopesto pavement; the upper one, bearing blackening from Attila's fire, has geometrical decorations.

Externally, behind the 9th-century campanile and the apse, is the Cemetery of the Fallen, where ten unnamed soldiers of World War I are buried.

She lost her son in World War I and she made the selection of the body of the Unknown Soldier of Italy.