What is "troejborg"

Trøjborg is a neighborhood in the city of Aarhus, Denmark in Skt. Johannes parish with about 11,000 residents in 2015. The neighborhood is part of the district Aarhus N and borders the neighborhoods Nørre Stenbro to the South West, Risskov to the North and Riis Skov and the Bay of Aarhus to the East. Trøjborg is delimited by the streets Dronning Margrethesvej, Trøjborgvej and Nordre Ringgade.