Pizza is a popular food like the hamburger, fried chicken, or milk shakes, which could be found all around the world. We know where those foods came from, but until recently, where pizza came from was a bit of a controversy. There were two cultures which claimed pizza as their own.
The word "pizza" has always been known to mean pie or cake, and is an Italian word. This fact alone might suggest pizza's origins. However, some years ago, in New York city, a Chinese restaurateur challenged the Italian ethnicity of pizza by declaring that pizza was originally a Chinese food, but was then taken along with pasta by Marco Polo back to Italy. It seemed the question would never be solved.
The result was announced（宣告，宣称） by a judge(判断): as early as the Roman Empire（帝国）, pizza was baked in ovens there and eaten. Chinese normally steam（蒸，煮） or fry（煎，炸） their foods, not bake them. Bread and other baked goods to which pizza belongs were developed from India through Europe where they are still enjoyed today. Besides, cheese is an essential（必不可少的） element of pizza, and the Chinese traditionally did not produce cheese. The case was closed, and pizza's paternity（来源） has now been established（证实，确实）.