Complex sentence: Under direction of bank President James M. Wilcox, they began seeking designs for a building, of which that by architects William Lescaze and George Howe was accepted by the board of directors in November 1930.
Split into simpler sentences: Under direction of bank President James M. Wilcox they began seeking designs for a building. The design by architects William Lescaze and George Howe was approved by the board of directors in November 1930.