King Charles III of Spain reigned from 1759 to 1788 and was a significant monarch of the Bourbon dynasty. He is known for implementing various reforms aimed at modernizing Spain's economy and administration, which included promoting agriculture and trade. During his reign, Charles III also focused on cultural development, supporting the arts and sciences. His efforts led to the establishment of institutions like the Royal Academy of Fine Arts of San Fernando. Charles III is often remembered as one of Spain's most effective rulers, earning the nickname "the best mayor of Madrid" for his urban improvements.