[2][3] S Seyhoon became famous for his design work in the 1950s in Iran, including: Tehran's Central Railway Station and tombs of scientific/literary figures (such as the Avicenna Mausoleum in Hamadan).

His academic journey reached its pinnacle with the completion of his formal training at the Ecole des Beaux-Arts in 1948, highlighted by his final project "Le mausolée d'Avicenne à Hamadan.

Subsequently, Seyhoun's ascent within academia led him to assume the role of dean at the School of Fine Arts at the University of Tehran, succeeding Mohsen Foroughi in 1961.

He led his students in exploring diverse structures across Iran, and their collaboration with the antiquities department resulted in the elevation of numerous neglected buildings to the status of historic sites.

His body was buried wrapped in the three-color lion-and-sun flag of Iran and A Derafsh Kaviani in a coffin in Forest Lawn's graveyard in Los Angeles.