A half note is worth two beats, when a dot is added, the dot is worth 1/2 of the two beats, which equals one. ... A double-dotted half note would have the same duration as a whole note. Its duration would be a half note tied to a quarter note tied to an eighth note.
Diego Rodríguez de Silva y Velázquez was a Spanish painter, the leading artist in the court of King Philip IV, and one of the most important painters of the Spanish Golden Age.