Mozaffar ad-Din Shah Qajar
King Mozaffar ad-Din Shah Qajar signed the 1906 constitution shortly before his death. He was succeeded by Mohammad Ali Shah, who abolished the constitution and bombarded the parliament in 1908 with Russian and British support. This led to another pro-constitutional movement. The constitutionalist forces marched to Tehran, forced Muhammad Ali Shah's abdication in favor of his young son Ahmad Shah Qajar, and re-established the constitution in 1909.