Louis Sullivan Bank | Grinnell, IA - Official Website The Merchants National Bank building is one of the eight Midwestern « jewel-box » banks designed by Louis Sullivan, legendary American architect and mentor of Frank Lloyd Wright. The bank was constructed in 1914 for $60,000 and remained a bank until 1999. Here our xplanecitysketch. . #urbansketch #sketch #urbansketchers #urbansketching #sketchbook #watercolor #drawing #usk #sketching #art #illustration #urbansketcher #architecture #watercolorpainting #sketchwalker #sketchers #watercolorsketch #watercolour #sketches #artwork #draw #global #urbansketches #aquarelle #daily #ink #enricofabbri_acrossdesign #xplanecitysketch #acrossdesign #adhocvoice