San Giacomo, Gothic parish church in Villanova district, Cagliari, Italy.

San Giacomo is a parish church in Cagliari's Villanova district. Its 19th-century Neoclassical facade by Gaetano Cima has a triangular pediment on four Corinthian columns, a round-headed window and a stone-framed double door, with a small cross on top. The square Gothic bell tower, about 30 metres high, stands at its left. Inside, a single nave has five chapels per side between the buttresses.

The building was first documented in 1346 and received its bell tower between 1442 and 1447, showing its early place in medieval Cagliari. Later, 19th-century renovations transformed its appearance, adding the Neoclassical facade that still defines it today.

The first chapel on the left, at the base of the bell tower, holds a 15th-century terracotta Compianto, a lamentation group. The third chapel on the left, dedicated to the Crucifix, was built to designs by the Piedmontese architect Viana and holds a 15th-century wooden Crucifixion group with the pious women beneath the cross. The organ, by the Neapolitan builder Carlo Mancini in 1769, came from the adjoining Oratory of the Souls in Purgatory.

San Giacomo stands on Piazza San Giacomo in Villanova, beside the facades of the Oratories of the Souls and of the Holy Crucifix. The church is a working parish, so visits fit around services; dress modestly. The bell tower rises about 30 metres on the left of the facade, a useful landmark when orienting yourself in the district.

The bell tower was added in a separate construction phase between 1442 and 1447, more than a hundred years after the church was first documented. This two-stage development shows how medieval communities expanded their religious buildings to meet changing needs over generations.