The gatehouse to the second, inner court was adorned in 1540 with the Hampton Court astronomical clock, an early example of a pre-Copernican astronomical clock. Still functioning, the clock shows the time of day, the phases of the moon, the month, the quarter of the year, the date, the sun and star sign, and high water at London Bridge. The latter information was of great importance to those visiting this Thames-side palace from London, as the preferred method of transport at the time was by barge, and at low water London Bridge created dangerous rapids. This gatehouse is also known today as Anne Boleyn's gate, after Henry's second wife. Work was still underway on Anne Boleyn's apartments above the gate when Boleyn was beheaded.