The incestuous relationship of Cersei and Jaime had been concealed in a conspiracy. Their son Joffrey Baratheon had claimed the Iron Throne on the premise that he was actually fathered by the late King Robert Baratheon. Lord Tywin was a key supporter of his reign in the War of the Five Kings. The Lannisters continued to hold sway when Tommen Baratheon ascended the throne, with Kevan Lannister as Hand of the King and Protector of the Realm, but lost their hold over Tommen to the Faith of the Seven, and, after destroying the Great Sept of Baelor, Cersei took the throne. With the deaths of Cersei and Jaime at the Battle of King's Landing, Tyrion is now the head of House Lannister and given up the crown in favor of an elective monarchy. It currently swears fealty directly to the King of the Andals and the First Men, an office which is currently held by Bran Stark.