The Van Allen Building, also known as Van Allen and Company Department Store, is a historic commercial building at Fifth Avenue and South Second Street in Clinton, Iowa. The four-story building was designed by Louis Sullivan and commissioned by John Delbert Van Allen (October 5, 1850 – December 30, 1928). Constructed 1912–1914 as a department store, it now has upper floor apartments with ground floor commercial space. The exterior has brick spandrels and piers over the structural steel skeletal frame. Terra cotta is used for horizontal accent banding and for three slender, vertical applied mullion medallions on the front facade running through three stories, from ornate corbels at the second-floor level to huge outbursts of vivid green terra cotta foliage in the attic. There is a very slig