Two pieces of Iowa City history have received national recognition after a three-year process of studying their history.The Tate Arms, 914 S. Dubuque St., and the Iowa Federation Home, 942 Iowa Ave., two buildings that housed black students at the University of Iowa at a time when they were barred from campus housing, are now on the National Register of Historic Places.The designation is the culmination of a nominating process that started in 2017, when the National Park Service awarded a $16,000 grant to the city to develop educational materials on the homes and prepare nominating forms for the national register.