Complex sentence: It was dissolved in the Reformation and a private house built on the site, which in 1699 became the Lutheran Roskilde Adelige Jomfrukloster (now known as Roskilde Kloster), a women's collegiate foundation.
Split into simpler sentences: It was dissolved in the Reformation and a private house built on the site. In 1699, the private house which replaced the Priory, became the Lutheran Roskilde Adelige Jomfrukloster (now known as Roskilde Kloster), a women's collegiate foundation.