Casa de Avellaneda - Museo Histórico (Avellaneda's Home - History Museum).
Address: Congreso 56.

Casa de Avellaneda is situated downtown, a few yards away from Plaza Independencia (Independence Square). Its construction was authorized in 1835 by Governor José Manuel Silva and the engineer designing the working drawing was Pedro Delgare Echeverry, who also designed the Cathedral.

For long, this old house was one of the centers of social life in Tucumán, also becoming a dwelling place for politicians of different origins, such as Marco Avellaneda (leader of the Northern League in opposition to Rosas), President Nicolás Avellaneda, Governors Agustín Justo de la Vega and Juan Manuel Teran.

For some time it was known as the 100-door house, since this was the exact number of doors it had and, curiously enough, it had no windows. Nowadays, after being remodeled, there are only fifty doors left. The splendid quebracho beams and tie beams worked with a hatchet, the joinery and iron fittings, are all originals of the period. It is one of the few buildings of early 19th century, which has been kept practically intact.

Since 1976, Casa de Avellaneda has housed the History Museum of the province of Tucumán. It has eleven rooms with 9 devoted to permanent exhibitions and the other two, to temporary ones.