The Hallett Flat-Rawson & Co. Apartment Building at 13th and Locust is comprised of two abutting buildings. One is the Hallett Flats, built in 1904, which is a three-story building designed by architect George E. Hallett. The other is the Rawson & Co. Apartment Building, or Arlington Apartments, a four-story building designed by Proudfoot, Bird & Rawson in 1915. They were built in such a way that the two would function as one building. The combination was listed on the National Register of Historic Places in 2000 “as a fine example of a multiple-function complex, designed during the early twentieth century by two of Des Moines’ most prominent architectural firms.”