Western sculptor R. David Mattiza, of Katy died friday of a brain hemmorhage at age 61. He maintained a studio and gallery at the Great Southwest Equestrian Center in Katy, and was a founding member of the Katy Culture & Arts Alliance. The artist’s bronzes are in the collections of the Pentagon, White House, the George H.W. Bush Library, and bridge of the submarine USS Texas. His 9/11 memorial piece, The Day America Cried, was auctioned for $85,000 to benefit wounded veterans of the Iraq and Afghanistan conflicts. A memorial celebration will take place at 2pm Wednesday January 18, at Agave Road, 1016 FM 1463, Katy.