The Almirante Cervera class (or Alfonso class) were three light cruisers built for the Spanish Navy in the 1920s. The ships were built by Sociedad Española de Construcción Naval in Ferrol which had strong British links and were designed by Sir Philip Watts. The design was based on the British Emerald-class cruiser, but had all boilers grouped together reducing the number of funnels to two. The main armament comprised Vickers pattern 6-inch guns with single mountings in "A" and "Y" positions and twin turrets in "B", "Q" and "X" positions. The programme was initially authorised in 1915 but was delayed by World War I with construction of the first ship starting in 1917.