The neoclassicist building of the Mud Baths is one of the most important symbols of the Pärnu resort. The building was designed by Olev Siinmaa and Baltic German designers Erich von Wolffeldt and Aleksander Nürnberg; it was constructed in 1926-1927 in place of a bathing house that burned down in World War I. The history of the Pärnu Mud Baths but also of the resort can be traced back to 1838, when the bathing house by the sea offered warm sea baths in the summer and hot sauna in the winter.
In the Soviet era, the Mud Baths started to serve the health of the working people; after Estonia's independence, it became deserted and lost its function. In 2014, a cosy boutique spa was opened in the historic mud baths building.