Tom Tower

This square tower with an octagonal lantern and facetted ogee dome was designed by Christopher Wren and built 1681–82.

The strength of Oxford architectural tradition and Christ Church's connection to its founder, Henry VIII, motivated the decision to complete the gatehouse structure, left unfinished by Cardinal Wolsey at the date of his fall from power in 1529, and which had remained roofless since.

Aside from a student prank in 2002 [citation needed] when the clapper was lagged (enclosed or covered with a material providing insulation), Tom has sounded every night since the Second World War.

There is an inscription on the bell in Latin, which translated reads: "Great Thomas the door closer of Oxford renovated April 8, 1680 in the reign of Charles II.

Deacon John, the Bishop of Oxford and sub-Deacon give thanks to the knowledge of Henry Smith and the care and workmanship of Christopher Hodson".Great Tom is still sounded 101 times every night, which signifies the 100 original scholars of the college plus one (added in 1663).