The area has been inhabited since Mesolithic times. The flint tools found here from that era (6000–4500 BC) are clearly defined and known as the Oldesloer Stufe. For a number of years in the 18th century the Moravian Church had a congregation in Bad Oldesloe. It was called "Pilgerruh", i.e. "Pilgrims' Rest". It was given up because of difficulties with the Danish Church authorities. At that time, the Duchy of Holstein was ruled by the kings of Denmark within the Holy Roman Empire.
On 24 April 1945, the town was heavily bombed by Allied forces in the final days of the Second World War in Germany. Threehundred buildings were destroyed, and 706 people were killed as a result of the operation.[2]
Buildings
16th century Mennokate: Memorial for Menno Simons, founder and eponym of the Mennonites, a group of anabaptists. He had some of his works printed in this building.
^Kuhlmann-Schultz, Kerstin (10 September 2014). "24. April 1945 — Oldesloes schwarzer Tag" [24 April 1945 - Oldesloe's black day]. Lübecker Nachrichten (in German). Retrieved 3 May 2019.