The Imperial House of Sebastian is the royal house of the Khaganate of Jelbania It was founded by Emperor John I by royal proclamation on November 3284, when he changed the form of government to a constitutional monarchy, declaring his family as the new sovereign. Currently, the most prominent member of the House of Sebastian is its head, Emperor Bryan John, the reigning monarch of the Jelbanian realm. The House of Sebastian, as the imperial and royal family, has the legal and constitutional prerogatives and practices associated with that status.