In the same period, the village was burned to the ground in a Crimean Tatar raid of Lesser Poland, and its residents were either murdered or kidnapped.

In 1837, Solec officially received the status of a spa town, after which a hospital, a hotel, public houses, a park and several other facilities were opened.

They modernized Solec, turning it into a fashionable spa town, which in the Second Polish Republic attracted several notable guests, such as Ignacy Jan Paderewski, Eugeniusz Kwiatkowski, opera singer Wanda Werminska, actor Aleksander Zelwerowicz.

After the German-Soviet invasion of Poland, which started World War II in September 1939, Solec was occupied by Germany.

After World War II, the Soviet-installed Communist government of the People's Republic of Poland forcibly nationalized the spa, merging it with another local town, Busko-Zdrój, and creating a company called Uzdrowisko Busko-Solec.