Sala del Tricolore, Government building in Reggio Emilia, Italy

The Sala del Tricolore is the council chamber of Reggio Emilia, an elliptical room ringed by three rows of balconies and lit by a large chandelier. Columns with Corinthian capitals stand in a neoclassical setting, and the civic gonfalone of the municipality is kept here. The hall sits inside the town hall on Piazza Prampolini, next to the cathedral.

The hall was built from 1772 to 1785 by Lodovico Bolognini as the Este ducal archive, but was never used as such for fear of fire. On 27 December 1796, 110 delegates chaired by Carlo Facci met here and approved the constitution of the Cispadane Republic. On 7 January 1797, Giuseppe Compagnoni proposed the green, white and red flag, which the congress adopted.

The hall houses the civic gonfalone of Reggio Emilia, a standard bearing a gold medal of the Madonna della Ghiara with Saints Prospero, Grisante and Daria. Every 7 January it hosts the Tricolour Day ceremony, attended by the highest offices of the Italian Republic. It also serves for cultural events, conferences and weddings.

The hall is located on Piazza Prampolini near the Cathedral and is accessible during museum hours. Visitors should note that it may close for municipal meetings and private events.

Engineer Ludovico Bolognini designed this space in 1774 originally as a ducal archive. Its later transformation into an assembly hall made it the birthplace of Italy's national flag.