Complex sentence: The ornate interior of the theater was designed by Nestor Castro, the art director for the Libman-Spanjer Corporation, which designed the interiors of many theaters in the Times Square area.
Split into simpler sentences: The ornate interior of the theater was designed by Nestor Castro. Mr. Castro was the art director for the Libman-Spanjer Corporation which designed the interiors of many theaters in the Times Square area.