The coat of arms of Puerto Rico was first granted by the Spanish Crown on November 8, 1511, making it the oldest heraldic achievement still currently in use in the Americas. The territory was ceded by Spain to the United States in accordance to the peace treaty that ended the Spanish–American War in 1899, after which two interim arms were adopted briefly. A law was passed in 1905 that reestablished the historical armorial bearings as the arms of the territory. Then in 1976, after numerous investigations and amendments, the current version was adopted. History The main element of the coat of arms of Puerto Rico is the Lamb of God. Despite Puerto Rico being a US territory, the shield continues to have elements reminiscent of Spain's presence in the New World. There have been different variations of the coat of arms throughout Puerto Rico's history. The current version was officially readopted by the government of Puerto Rico on 3 June 1976. On the shield: The green background represents the island's vegetation. The Lamb of God and cross flag on the shield are symbols traditionally associated with St. John the Baptist, patron of the island. The book with the seven seals on which the lamb sits represents symbolism from the Book of Revelation, generally attributed to St. John the Apostle. The border is made up of 16 different elements: castles and lions to represent the Kingdom of Castile and the Kingdom of León, a flag with the arms of the Crown of Castile and León, and The Cross of Jerusalem to stand for the Kingdom of Jerusalem, whose succession rights passed to the Kingdom of Sicily, and henceforth to the Spanish Crown. The gold-crowned F and the arrows () represent Ferdinand II of Aragon, while the Y and the yoke () represent Ysabel, i.e., Isabella I of Castile who were the Catholic monarchs when Puerto Rico was discovered. It is said, that the "I" on the shield, was in fact a "J" representing Queen "Joanna", commonly known as "Juana La Loca", daughter, and successor of Queen Isabella after she allegedly became mentally ill after the death of her husband, and in whose name her father, as regent of Spain granted the coat of arms to the Spanish territory of San Juan, as Puerto Rico was then known. The Latin motto, "JOANNES EST NOMEN EJUS" (a quotation from the Vulgate of Luke