The historian Rudolf Gustav Puff described Rogaška Slatina in a special publication, and 24 lithographs of the town were created by the artist Josip Reiterer in the early 19th century.

The chemist Adolf Režek set up a small chemistry laboratory in Rogaška Slatina in 1931 and published various material about the town.

[7] In the following weeks, the occupier's complex administration was set up, who transformed Rogaška Slatina because of its health and glassmaking importance, large accommodation capacity and position along the German-Croatian state border on the Sotla River into one of the key outposts of the Lower Styrian occupation zone.

[8] Daniel Siter in his thesis Rogaška Slatina during the period of German occupation (1941-1945) mentions the Croatian Nazi-collaborationists Ustashe (slov.

[11][12] The Flower Hill Mass Grave (Grobišče Cvetlični hrib) lies east of the town and is believed to occupy the entire ravine below the former Triglav Hotel.

The castle lord Peter de Curti built an inn at the site in 1676 and charged people to visit the springs.

[6] The parish church in the town is dedicated to the Holy Cross and belongs to the Roman Catholic Diocese of Celje.