Tower of Keshmar
12 walls , 48 columns 1 door ,3 windows ,8 holes on the columns , 2 stairs
,1 window on corn ,and many holes on corn it is like
We can observe sunlight and moonlight comes from holes , windows and
on the columns.
We can find azimuths and altitude, sun, moon and stars in this
comes from a
on the corn and passes from the only hole of the hemisphere
at Noruz and find equinox day .this direction made for finding equinox day
and first day of the Iranian calendar .
on the Columns find exact midday and the tower made exact
celestial meridian .
geographical latitude is 35:18
sunlight comes from
at Noruz and find equinox day .
by Khaje Nasir Tusi group like the tower of Radkan , plus
Maragheh observatory .