Former post office, Pirmasens, Cultural heritage monument in Pirmasens, Germany.

The Alte Post in Pirmasens is a two-storey sandstone building erected in 1893 as a Royal Bavarian post office in Neo-Renaissance style. Its main facade has three large triumphal-arch portals, a rusticated ground floor, and first-floor windows with alternating triangular and round pediments. The architect was Ludwig von Stempel.

Built from 1891 to 1893 to plans by Ludwig von Stempel, the post office rose because Pirmasens' shoe industry generated parcel volumes that overwhelmed older facilities; from 1890 to 1905 the town ranked first among the Palatinate's post offices. It served as a first-class post office until 1926, then housed the telegraph and Kraftpost offices until closing in 1976. The city bought it in 1986, and after renovation it opened in 2014 as Forum Alte Post.

Since 2014 the building has been the Forum Alte Post, housing the Kulturamt and the Bürkelgalerie, which moved here from the Altes Rathaus in April 2014. In November 2016 the Hugo-Ball-Kabinett opened, an interactive permanent exhibition on the Dada co-founder Hugo Ball, who was born in Pirmasens in 1886.

The building sits on Poststraße south of Pirmasens Hauptbahnhof, between Bahnhofstraße and Teichstraße; that stretch of Poststraße is closed to car traffic. The current entrance is in the northern tower at the rear, facing the Posthof. The southern main facade frames Joseph-Krekeler-Platz, laid out in 2015 on the site of the Hotel Matheis demolished in 2014.

The building owes its survival partly to Elisabeth Hoffmann, who left the city over 2 million DM in 1978; mayor Karl Rheinwalt reserved the money solely for the Alte Post. The architect Ludwig von Stempel received 2,300 Mark from Prince Regent Luitpold in 1897 for his work here.