The adoption of Christianity in both Scandinavia and eastern Europe brings about a gradual transformation in the arts. Churches of lasting materials are built and decorated in styles sometimes derived from local pre-Christian traditions and sometimes borrowed from Romanesque, Gothic, or Byzantine work. In the twelfth and thirteenth centuries, foreign workshops execute many important commissions in Scandinavia, and local art shifts gradually from the French orbit to the German. In eastern Europe, the art of Kievan Rus’ reflects Byzantine models.