The paellera, or simply paella (from the Latin patella, cooking vessel) is a special skillet for cooking the dish known as paella, which consists of rice simmered with a variety of ingredients. It originated in the Albufera district of Valencia, but it has become a typically Spanish dish known all over the world. Their diameter is usually very large in proportion to their depth in order to optimize cooking, and they have a handle at either side to facilitate lifting.