[1] Sisters of Poor Clares came to Bydgoszcz in 1615, and after the construction of the monastery (now one of the city museum buildings), the adjacent garden was created and organized.

[3] After secularization of the order by the Prussian authorities, the garden belonged to the regional office of Bydgoszcz, which turned it into a three hectare "District Park" (German: Regierungs Garten) in 1835, forbidden to city residents.

[1] At this time, many species were growing in the park, including park include:[1] elms, sessile oaks, pyramidal English oaks, ailanthi, horse-chestnuts, sugar maples, maple trees, birches, Siberian peashrubs, purple hazels, purple European beeches, Kentucky coffeetrees, grandiflora hortensias, kerrias, magnolias, American sycamores, peony bushes, black locusts, robinias, snowberry bushes, large-leaved limes, small-leaved limes, yews, pines, black pines, Caucasian walnuts, baldcypresses, London planes and other trees and shrubs.

In 1946, to celebrate the 600th anniversary of Bydgoszcz an exhibition about Pomeranian Industry, Craft and Trade was held in the park and in the three schools located at Konarski Street.

[6] In the 1990s and the beginning of 21st century, the park Casimir the Great has undergone a restoration, culminating by the reconstruction of fountain "The Deluge" to its original shape in 2014.