Spoiler alert! The following contains details from the Season 4 premiere of "The Gilded Age."

Salve Regina University’s Ochre Court opens the fourth season of HBO’s “The Gilded Age,” which premiered Sunday on HBO Max. The season’s first scenes are set in the mansion, which portrays Sidmouth Castle — the home of Hector, Duke of Buckingham, and his new wife, Gladys Russell. Ochre Court, designed by Gilded Age…