 The Roskilde bishops owned large areas of land in the region including, from 1186, Havn on the Øresund which later became Copenhagen.By the time of the Danish Reformation in 1536, there were 12 churches and five monasteries in the city.It is not clear when Roskilde became a market town but it was certainly enjoying trading privileges under King Eric II who reigned from 1134 to 1137.