The Senate of Diadochia (Greek: Γερουσία των Διαδόχων, Iberian: Senatus Diadochi), formally styled the Right Honourable the Árchontes Spiritual and Temporal of Senate the Empire of Diadochia in Parliament assembled and referred to ceremonially as the House of Árchontes, is the upper house of the Parliament of Diadochia. Like the House of Koiná, it meets in the Palace of Magnaura.