English: St Woolos Cathedral tower The fine west tower, which today contains a ring of twelve bells, and was the first tower in Wales to be thus equipped, has stonework of many centuries. The tower base was built by monks from Gloucester, and dates from about 1100. The second stage is the work of Humphrey, Earl of Stafford, and was added in the repairs following Owen Glyndwr’s ravages of 1402. The belfry stage was added about 1480 by Jasper Tudor, uncle of the Welsh King Henry VII. The above information was extracted from this http://www.bellhistorians.org.uk/downloads/newport.pdf from where information about the bells can also be found.