On what would you see a 'gnomon' ?
Sciothericum Shadow clock Universal equinoctial ring dial Equatorial sundial Shadow-clock Wall sundials Sundials Sun dial SUNDIAL Solar clock Sundail Sun-dial Sea ring Sundial clock Sundial
sundail solar clock shadow clock sundial sciothericum sundial clock wall sundials equatorial sundial sea ring sundials universal equinoctial ring dial sun dial
sundial
WikipediaEntity
SUNDIAL