The Pontifical Basilica of Saint Nicholas is a church in Bari, southern Italy, that holds wide religious significance throughout Europe and the Christian world.

In 2012, a set of integrated data from ground-penetrating radar and seismic sonar highlighted the presence of relevant water infiltrations in two areas of the crypt restored in 1950, which may possibly be due to an accumulation of humidity.

[1] The Basilica houses one of the most noteworthy Romanesque sculptural works of southern Italy, a cathedra (bishop's throne) finished in the late eleventh century for Elias.

The Museum of the Basilica has valuable works of art, including a collection of twelfth-century candelabras donated by King Charles I of Anjou.

In the 20th-century restoration, most of the Baroque additions were removed, leaving only the gilded wooden ceiling, enframing canvases by Carlo De Rosa.

On this day, it is traditional for the clergy of the basilica to lower a flask into the subterranean tomb of Saint Nicholas to extract some of the myrrh which is believed to exude from the relics.

9 May (22 May) is celebrated annually in the Russian Orthodox Church as the feast day of the "Translation of the Relics of Saint Nicholas from Myra to Bari".