For 10 points, name this Biblical figure whose beheading and baptisms are often depicted in paintings.
At the right of a painting by John Everett Millais, a timid, boy version of this man is shirtless and holds a bowl while the title figure is attended to in "the house of his parents". When closed, the two bottom middle panels of the Ghent Altarpiece depict two grisaille sculptures of this figure. In another painting, an elongated version of this non-Christ figure wears a blue robe and raises his arms in El Greco's Opening of the Fifth Seal. An infant version of this man appears to the left of Mary in front of a craggy landscape in da Vinci's Madonna of the Rocks. For 10 points, name this Biblical figure whose beheading and baptisms are often depicted in paintings.
At the right of a painting by John Everett Millais, a timid, boy version of this man is shirtless and holds a bowl while the title figure is attended to in "the house of his parents".
John the Baptist