Aduanas Building, Montevideo, Administrative building at Rambla 25 de Agosto de 1825, Montevideo, Uruguay.

The Aduanas Building is a six-story administrative structure on the Rambla 25 de Agosto de 1825 in Montevideo, designed by architect Jorge Herrán in Art Deco style and inaugurated in 1931. It houses the National Customs Directorate and the National Navy Command. Its 62-meter tower, crowned by a glass dome, rises above the main building, which stands 38 meters tall.

The structure was designed following a public competition in 1922 with 19 participating architects and was completed in 1931. This construction period reflected Uruguay's economic growth and its ambition to establish a modern port city with contemporary architecture.

The building represents Uruguay's connection to international trade and maritime commerce, positioned prominently where merchants and officials conducted business for generations. Its architectural style expressed the modernist ideals that shaped cities across the Americas during that era.

The building sits along the Rambla waterfront and is easily accessible on foot from the city center through the scenic promenade. Since it functions as an active administrative center, visitors should confirm whether interior access is available, as visits are typically limited or may only be viewed from the exterior.

The 62-metre tower topped by a glass dome makes the building taller than its six storeys suggest; the sources give 38 metres for the main structure. Jorge Herrán was only 26 when his entry won the 1923 competition, chosen from 19 submissions by a jury that included architects Alfredo Jones Brown and Horacio Acosta y Lara.