Located in Clinton, Iowa and designed by Louis Sullivan the Van Allen Building. It was declared as a National Historic Landmark in 1976. This building was also known as Van Allen and Company Department Store that is commissioned by John Delbert Van Allen. Constructed in 1912-1914, this building served as a department store during those times. Today the building rents its upper floors as apartments and the ground floors as commercials spaces.

The whole building was cleverly constructed with Van Allen and Sullivan working to make sure that every space is going to be well utilized. The main floor of the store was intended for general dry goods and men?s supplies, the whole second floor was for the display of women?s costumes, the third floor was for household fabric supplies such as beddings, curtains, and rugs. The top floor didn?t have an immediate use however was kept for future expansion. The building became an important part of the history and development of the city of Clinton.