Piran is a town in southwestern Slovenia on the Gulf of Piran on the Adriatic Sea. It is one of the three major towns of Slovenian Istria. The town is known for its medieval architecture, with narrow streets and compact houses. Piran is the administrative seat of the Municipality of Piran and one of Slovenia's major tourist attractions. Until the mid-20th century, Italian was the dominant language, but it was replaced by Slovene as demographics shifted.

Piran was heavily influenced by the Venetian Republic and Austria-Hungary, therefore the monuments differ greatly from those in inner parts of Slovenia. The Piran town walls were constructed to protect the town from Ottoman incursions; many parts of the town walls from different eras remain, and are of interest to tourists. In the middle of the town is the Tartini Square, with a monument in memory of Giuseppe Tartini. Nearby are located various important buildings, such as Tartini's house, first mentioned in 1384 and one of the oldest in town, the Municipal Palace, Loggia and Benecanka, among others. On the hill above the town is the biggest and most important church, the Saint George's Church, with a Franciscan monastery nearby.