The university's arms were granted on 18 March 1955 by Garter, Clarenceux and Norroy and Ulster Kings of Arms to the Birmingham Corporation, for use by the former College of Technology. They were designed to show the college's connection with the city and with the teaching of technology. The arms consist of a shield and crest. The shield has two sections – the field (the main background) which is coloured blue and a chief (the broad band across the top of the shield) of silver. On the field is a diagonal line of five gold diamonds joined one to the other, similar to the first quarter of the Arms of the City of Birmingham and incorporated in the Arms of the college to show its connection with the city. This was adopted by the family of Birmingham which derived its name from the then hamlet of Birmingham, and provided the Lords of the Manor from the fourteenth to the sixteenth centuries. On the chief is depicted an open book bound in red placed between two black hammers, showing the connection of the University with technology, the book representing learning and the hammers engineering and allied trades.