Founded in the 15th century, Maribo's cathedral was once part of a larger monastic complex. Countess Leonora Christine, daughter of Christian IV, joined the convent in 1685 after she was released from a 22-year imprisonment in Copenhagen Castle. She lived the rest of her life here, editing the prison journals that record her tribulations – rat infestations, a flea-infested cell, a randy jailer and the vindictiveness of the queen, Sophia Amelia. Leonora Christine’s crypt is in the cathedral, marked by a plainly lettered tombstone.