GASSHO. 2018. Steel and stone 12' 6" h x 37' x 49' . Temporary installation for Morris Arboretum, PhIladelphia, PA. Solar calendar and sun dial clock. The figure on top of the steel structure is based on an ancient Sumerian cuneiform sun symbol, the oldest known written representation for the sun. On the solstices and equinoxes the shadow of this figure falls on one of the round stone markers. Throughout the year, at the top of every hour, the shadow of the gnomon (the tallest pole) bisects the appropriate square stone marker on the diagonal.. Gassho is a Japanese term for the hand gesture of "palms together", indicating both gratitude and also unity, as in "two are also one".