Reims is a city in northeastern France located in the Champagne-Ardenne region. It is the unofficial capital of the champagne-producing region, and most of the major champagne houses based there offer tastings and tours of their cellars. The triumphal arch of the Porte de Mars dating from the 3rd century bears witness to the city's past under Roman rule. For more than 1,000 years, French kings were crowned at Notre-Dame Cathedral in Reims