Why was the year 711 is important in the history of Spain?

In 711 Muslim forces invaded and in seven years conquered the Iberian peninsula. It became one of the great Muslim civilisations; reaching its summit with the Umayyad caliphate of Cordovain the tenth century. Muslim rule declined after that and ended in 1492 when Granada was conquered. HOPE IT HELPS :3

who do the detectives meet in the cementery: ¿con quién se encuentran los detectives en el cementerio?