Irish culture in America is widespread though not especially visible as such except on Saint Patrick's Day, when, it is said, "Every American is Irish." Many Irish began to immigrate after World War I. However, there was a decline in immigration after U.S. Congress began to limit the numbers of individuals immigrating. The numbers of Irish immigrants began to increase again after World War II. Most Irish who came to the United States settled in urban areas. Many of these neighborhoods retain aspects of Irish culture, especially around the local Catholic church.