Altes Rathaus Düsseldorf, Historic city hall in Altstadt, Düsseldorf, Germany.

The Altes Rathaus stands as a Renaissance building constructed between 1570 and 1573, featuring characteristic curved gables, an octagonal stair tower, and baroque modifications added in 1749 by Johann Joseph Couven.

A first town hall stood on this spot from 1544 but had become dilapidated; the present building was erected between 1570 and 1573 as an Amtshaus and assembly house for the mayor, aldermen and council. Until 1806 it also hosted the Landstände of the duchies of Jülich-Berg. The city struggled to fund the construction and repeatedly asked the sovereign for help.

The ground floor's two large halls served as sales rooms for the wool weavers and other guilds. Since 1958–1961 a modern building by Friedrich Tamms and H. Heyne stands behind the old facade, containing the Jan-Wellem-Saal used for representative occasions.

The entrance sits in the octagonal stair tower on the north side of the Marktplatz; the number 1749 is carved above the portal that Johann Joseph Couven added beside it. The halls behind the Renaissance facade were rebuilt from 1958 to 1961 to plans by Friedrich Tamms and H. Heyne, and the Jan-Wellem-Saal inside is reserved for representational events rather than general visiting.

The structure uniquely combines original Renaissance architecture with baroque elements and modern extensions, creating a complex that reflects five centuries of architectural evolution in a single building ensemble.