<P> Mohammad Reza was Sovereign of many orders in Iran, and received honours and decorations from around the world . Mohammad Reza used the style His Majesty until his imperial coronation in 1967, ascending to the title of Shahanshah, when he adopted the style His Imperial Majesty . Mohammad Reza also held many supplementary titles such as Bozorg Artestaran, a military rank superseding his prior position as Captain . On 15 September 1965, Mohammad Reza was granted the title of Aryamehr (' Light of the Aryans') by an extraordinary session of the joint Houses of Parliament . </P> <P> From 24 April 1926 until his accession, Mohammad Reza's arms notably consisted of two Shahbaz birds in the centre, a common symbol during the Achaemenid period, with the Pahlavi Crown placed above them . Upon his accession, he adopted his father's coat of arms which included a shield composed of the Lion and the Sun symbol in first quarter, the Faravahar in the second quarter, the two - pointed sword of Ali (Zulfiqar) in third quarter and the Simurgh in the fourth quarter . Overall in the centre is a circle depicting Mount Damavand with a rising sun, the symbol of the Pahlavi dynasty . The shield is crowned by the Pahlavi crown and surrounded by the chain of the Order of Pahlavi . Two lions rampant regardant, holding scimitars supports the coat of arms on either side . Under the whole device is the motto: "Mara dad farmud va Khod Davar Ast" ("Justice He bids me do, as He will judge me" or, alternatively, "He gave me power to command, and He is the judge"). </P> <Table> <Tr> <Th> </Th> <Th> </Th> </Tr> <Tr> <Td> Coat of arms of Crown Prince Mohammad Reza (1926--1941) </Td> <Td> Coat of arms of Mohammad Reza Shah (1941--1980) </Td> </Tr> </Table> <Tr> <Th> </Th> <Th> </Th> </Tr>

How did the shah come to power in iran