The Town class was a group of twenty-one light cruisers built for the Royal Navy (RN) and Royal Australian Navy (RAN). These vessels were long-range cruisers, suitable for patrolling the vast expanse covered by the British Empire. These ships, initially rated as Second Class Cruisers, were built to a series of designs, known as the Bristol (five ships), Weymouth (four ships), Chatham (three RN ships, plus three RAN ships), Birmingham (three ships, plus one similar RAN ship) and Birkenhead (two ships) classes - all having the names of British towns except for the RAN ships, which were named after Australian cities.