Ethnographic farmsteads, manor centers, villages, cores of provincial towns, and the center of Tallinn, the capital of the republic, are listed as historical architectural ensembles in Estonia. Within the borders of the ensembles, protection zones have been enacted, and complex preservation and restoration of historical architecture is foreseen. Preservation of historical architecture as an ensemble is closely linked to monuments' proper present-day use. Buildings are designed for practical use and by their continued use the most valuable part of our architecture is preserved. Presents the main principles for regeneration of ancient towns and reconstruction of buildings. In more than 10 years of practical work, the regeneration of Estonian historic towns has taken a definite direction.