During which years did the Senate meet in the Old Senate Chambers?

The correct timeframe for when the Senate met in the Old Senate Chambers is from 1810 to 1859. This period corresponds to when the chambers were used in the United States Capitol before the Senate moved to the newly constructed chamber in the Capitol designed by architect Thomas U. Walter. The Old Senate Chambers were originally part of the Capitol and served as the Senate's meeting space until the expansion and renovation of the Capitol were completed in the mid-19th century. Understanding this timeframe provides insight into the historical context of legislative activities during that era, including significant legislation and events that shaped the early United States.

The other options reflect periods during which the Senate was not housed in the Old Senate Chambers. For instance, 1790-1810 would overlap partially with the time before significant renovations took place. The years 1860-1900 indicate that the Senate had already transitioned to its new chamber, and the years 1800-1850 only partially encompass the actual usage period, cutting off before the Senate's final sessions in the Old Chambers.