The town and surrounding land was pawned by the crown to the Diocese of Roskilde in 1370 but was redeemed by Queen Margaret I.

Psychiatric Hospital had its own Chapel and cemetery, both now part of the Nykøbing Sj.

The name "The Brainless Cemetery" (i.e., de hjerneløses kirkegård) was not a name out of disrespect for the patients buried there.

After the removal, the brains were sent to Psychiatric Hospital in Risskov (Aarhus, Denmark) to be used in research.

During the period that the removals were carried out, relatives to the patients were not asked for permission either were they informed.

The latter museum holds Northern Europe's largest privately owned collection of antique glass.

Nykøbing Sjælland is connected with Holbæk and the Danish rail network by the Odsherred Line operated by the railway company Lokaltog.