Palazzo Patriarcale, Religious palace in San Marco district, Venice, Italy

Palazzo Patriarcale faces Piazzetta dei Leoncini beside St Mark's Basilica, in the San Marco sestiere. Its four-storey Neoclassical facade is entirely clad in Istrian stone: a round-arched portal flanked by paired rectangular windows with coats of arms above, then an upper register of five bays divided by half-columns, each with a small mezzanine window and a larger window with projecting balcony. A frieze of six column capitals closes the main storey.

The building became the new headquarters for the Patriarchate of Venice after the basilica converted to a cathedral following the fall of the Venetian Republic. This shift made the palazzo an important administrative center for the Catholic Church in the city.

The Diocesan Museum opened here in 2007; between 2005 and 2007 the palace hosted two exhibitions, "Il ciclo di Tintoretto e la quadreria del Palazzo Patriarcale" and "Officina Dürer". The historical archives of the Patriarchate of Venice are also kept in the building.

The palace faces Piazzetta dei Leoncini, on the north side of St Mark's Basilica, and the ground-floor portal opens onto that small square. The Diocesan Museum occupies part of the building; its rooms are reached from the same side, next to the basilica's apse. Visitors enter from the square rather than from the basilica itself.

From 1894 to 1903, Giuseppe Melchiorre Sarto lived here before becoming Pope Pius X and leading the Catholic Church. This connection makes the palazzo a place of unexpected spiritual weight in the city's story.