Imamzadeh Abdollah is located in the square by the same name (Imamzadeh Abdollah Sq) in Hamadan. The structure is a 24 sided one and spherical in shape. Its facade has 12 arches and 12 supporting pillars. The lower portion of the structure, that is till a height of 90 cm. it has been constructed of hard stone after which brick has been used. Its dome, internally has been in crusted with colored limestone, above which is mirror-work. Within this structure are two tombs belonging to father and son by the names of Ahmed and Abdullah Ibn Ahmad, the descendants of Imam Moosa.