Spanish archaeologists have stumbled upon a delightful find.

A team of excavators has revealed a medieval structure within a Barcelona building that later served as a chocolate factory.

Although the building dates back to the 19th century, the walls and doors on the property indicate that the original structure has a much older origin, as stated in a press release issued on February 12 by the Barcelona Archaeology Service, written in Catalan.

Situated in Barcelona’s Plaça de la Llana, a medieval plaza, the name translates to “plaza of the wool” in Catalan, reflecting its historical use as a marketplace.

“Although the current estate dates from the 19th century, the parietal archeology work carried out so far has allowed the documentation of walls with arches and doors attributable to a large medieval house of the 14th century,” the translated press release said.

The precise age of the original building remains uncertain; however, if it was constructed in the 14th century, it could be between 625 to 725 years old, Fox News reported.

According to experts, the 14th-century house underwent a transformation in the 15th century, being repurposed into a hostel.

The medieval house “would have ceased to function during the 16th century,” the press release said.

Written by B.C. Begley