Rogal świętomarciński, also known as St. Martin's croissant or St. Martin's roll, is a filled croissant in a coating of icing with chopped nuts sprinkled over it. It gets its name from the traditional baking and eating of the rolls on Saint Martin's Day for 150 years up to this day in the city of Poznań and some districts in the Wielkopolskie Voivodship in Poland.

According to a traditional tale, the croissants date back to the days of the 1683 siege of Vienna when king Jan Sobieski and Poland's hussars defeated the Turks in a battle and bakers started to make the croissants to keep the victory in public memory, while the Turkish crescent contributed to the shape of the final product.

On the exterior, the rolls are dark golden to light brown while the dough is cream-colored, and the filling is beige. The filling consists of poppy seeds, sugar, raisins, nuts and almond flavoring. The flavors and aromas are sweet with hints of almond and poppy seeds.

All these elements combined together make this flaky pastry a unique and original product that cannot be found anywhere else in the world.