The Alhóndiga de Granaditas (public granary) is an old grain storage building in Guanajuato City, Mexico. This historic building was created to replace an old granary near the city's river. Its construction lasted from 1798 to 1809, by orders of Juan Antonio de Riaño y Bárcena, a Spaniard who was the quartermaster of the city during the Viceroyalty of New Spain.