Seguro Obrero Building, Art Deco office building in Civic District, Santiago, Chile

The Seguro Obrero Building is a twelve-story office block at the northeast corner of Morandé and Moneda streets, beside La Moneda Palace and Plaza de la Constitución. Architect Ricardo González Cortés designed it under the influence of the Chicago School and Art Deco, and it was built between 1928 and 1931.

The structure was completed in 1931 under architect Ricardo González Cortés and was then the country's tallest office building. It was built for the Caja del Seguro Obrero Obligatorio, created in 1924, and since November 1989 has housed Chile's Ministry of Justice.

The building displays geometric patterns and decorative elements that define the Art Deco style and shape the architectural character of the neighborhood. Visitors can observe these ornamental details on the facade, which reflect the modern design principles of the 1930s era.

The Ministry of Justice operates from this location and maintains regular office hours for government services. Visitors should note that the building functions as an active government office and access may be restricted accordingly.

After the rebels surrendered on 5 September 1938, police shot them inside the building, leaving 59 dead; who gave the order was never established, though President Arturo Alessandri Palma was suspected. The massacre damaged the right in the 1938 election and helped Pedro Aguirre Cerda of the Popular Front win.