Did the Irish immigrants come through Ellis Island in 1845?

No, Irish immigrants did not come through Ellis Island in 1845, as the facility officially opened in 1892. During the mid-19th century, particularly during the Great Famine (1845-1852), many Irish immigrants arrived in the United States through other ports, such as Castle Garden in New York City. Ellis Island became the primary Immigration station later, serving millions of immigrants, including many Irish, in the years that followed.