The Irish Railroad Workers Museum consists of two renovated alley houses in 900 block of Lemmon Street. The houses on Lemmon Street were built in 1848 to provide homes for the growing number of workers needed by America’s first railroad. One of the houses is furnished as a period-house museum, reflecting the lives of the Irish-immigrant family who lived there in the 1860s. The other house offers changing exhibits relating to Irish-American history and local neighborhood life.