In 1916, King Alfonso XIII of Spain commissioned an opulent palace hotel that would serve as a royal hideaway in the center of historic Seville. More than a decade of construction followed before the property—adorned with painted tiles, marble floors, and Moorish-style coffered ceilings—made its debut in 1929 with an elaborate celebration attended by the king and his wife, Queen Victoria Eugenie of Battenberg. Today, stepping into the Hotel Alfonso XIII is as enchanting as ever, thanks to a $25 million renovat…