Although some changes took place in housing after the Reformation, mainly due to declining availability of timber for construction, upper-class homes were still of good quality. In accordance with practices in the kingdom of Denmark in the 18th century, stone residences were built in Iceland for the high sheriff, governor and director of public health, as well as several stone churches. These buildings were designed by Danish architects, such as De Thurah and Eigtved. Few stone buildings were known in Iceland before that time, for reasons which are not fully understood. Bishop Auðunn the Red of Hólar (bishop 1313-22) had begun constructing a stone cathedral, but it was never completed. The rock was re-used in the construction of the present Hólar Cathedral in the 18th century. Lesa meira