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
universal equinoctial ring dial sundials solar clock sundial clock sundial equatorial sundial sun dial sciothericum sundail sea ring shadow clock wall sundials
sundial
WikipediaEntity
SUNDIAL