A dispute has erupted between the two German states of Bavaria and Thuringia over who can claim the title of inventor of the bratwurst sausage. Until now, the title of “the world’s oldest place to sell bratwurst” was claimed by the Bavarian tavern Wurstkuchl, the BBC reports.

The Wurstkuchl is located on the Stone Bridge in Regensburg on the Danube River. It is believed that the oldest documentary evidence of a cook or food stall at the Stone Bridge dates back to 1378.

But now historians in Erfurt, the capital of Thuringia, have discovered a document from 1269 that mentions the rental of a building with an oven more than 100 years earlier than the sausage stall in Regensburg.

They are now looking for the place in Erfurt where this same sausage stall once stood. No local restaurant has ever claimed the title of oldest bratwurst stand.

Previously, in Thuringia, the earliest written mention of bratwurst dates back to 1404. It states that in the town of Arnstadt they spent "1 groschen on sausage casings."