Some articles on vihaara, vihaaras:

Buddhism In Sri Lanka - History - Christian Missionaries and Colonialism
... Among these monuments the Isurumuni-vihaara and the Vessagiri-vihaara are important centers of worship to this day ... with the construction of the Pathamaka-cetiya, the Jambukola-vihaara and the Hatthaalhaka-vihaara, and the refectory ... The king not only built vihaaras for their residence but also provided them with their requisites ...