The article describes seventeenth century history of one of the buildings in Tykocin – alumnat. It is the traditional name of an old almshouse for veterans, which was founded by Christopher Wiesiołowski in year 1633. It is a four-wing building with an internal courtyard. In the southeastern corner of the alumnat there is a half-round apse. Two towers were the defensive advantage of the building. In the 17th century the alumnat held several functions. It was founded as a charitable institution for 12 noble war veterans, who were wounded defending Polish-Lithuanian Commonwealth, or were unable to earn for living due to their old age. Because of its defensive qualities and being located in the nearness of the bridge on the Narew River,...