Complex sentence: The Old Senate Chamber is a room in the United States Capitol that was the legislative chamber of the United States Senate from 1810 to 1859 and served as the Supreme Court chamber from 1860 until 1935.
Split into simpler sentences: The Old Senate Chamber is a room in the United States Capitol that was the legislative chamber of the United States Senate from 1810 to 1859. The room also served as the Supreme Court chamber from 1860 until 1935.