Paella originated in Valencia. It's a humble dish with many years of tradition. It's popularity has been so large that there are many variations in different areas of Spain and known in the entire world. Most, if not all, Spanish restaurants in Spain and abroad serve paella.
The word paella means "frying pan" in Valencia which derived from the Latin patella. It receives its name from the large frying pan like implement used to cook it in, made of iron or steel, which must have no more than 5 or 6 cm of depth. The diameter depends on the number of diners. It can go from 10 cm to 90 cm. Another particularity is that the long handle has been replaced by two ears. So when the word paella is mentioned, it may mean the dish, it may mean the frying pan!