Palácio Avenida, Eclectic architecture palace in downtown Curitiba, Brazil.

Palácio Avenida is a palace in the heart of downtown Curitiba, built in an eclectic style that draws from several European architectural traditions. Its facade features balconies, bay windows, and ornamental details that stand out along the central street where it sits.

Palácio Avenida was built from 1927 and inaugurated in 1929 by the Syrian-Lebanese entrepreneur Feres Merhy, to designs by Valentim Freitas, Bernardino Assumpção Oliveira and Bortolo Bergonse. The 18,000-square-metre complex housed offices, shops, cafés such as Café Guairacá and the Cine Avenida. Bamerindus bank bought it in 1968; after years of partial vacancy it stood abandoned by the late 1980s, and the bank rebuilt the interior and restored the facade, reopening it on 5 March 1991.

Since 1991, the "Natal do Palácio Avenida" has children's choirs singing traditional carols and Brazilian popular music from the building's windows, joined by a guest celebrity as master of ceremonies. The event is broadcast nationwide and draws large crowds to the city centre. In 2020 the choir performed without an audience and the show was streamed online.

The palace is located in the central district and is easy to reach from most parts of the city. A visit in December offers the added experience of seeing the facade lit up for the holiday season.

During December, the building's windows and balconies are lit individually so that the facade resembles a giant advent calendar. This effect is visible from several streets away and draws visitors from outside the city center.