clock was wound and maintained. The present clock dates from 1866 and uses a mechanism designed by Lord Grimthorpe, the same man who designed the clock mechanism that sits atop the Palace of Westminster commonly known as Big Ben. The clock, which was installed as part of the 1866 renovations cost £200 and was to be wound "every fourth day". The clock mechanism will undergo restoration works in 2021, carried out by Smiths of Derby, funded by a grant from Historic England. Access The Clock Tower is open on weekends and bank holidays between Good Friday and the end of September. It also open under the Heritage Open Days scheme and is sometimes open during special occasions such as the turning on of the St Albans Christmas Lights. The Tower is opened by a group of volunteers from the St Albans Civic Society and The St Albans and Hertfordshire Architectural & Archaeological Society. References External links 15th-century architecture in the United Kingdom 15th-century establishments in England Bell towers in the United Kingdom St Albans Buildings and structures in St Albans Grade I listed buildings in Hertfordshire Grade I listed towers St Albans Towers completed in the 15th century Towers in Hertfordshire