Does the casual museum visitor seeing an enormous, heavy work of art think about how it got to where it is and how it stays in place? And if he or she does, who can provide the answers to those questions? Brenda Cronin, writing in the July 25. 2017 issue of The Wall Street Journal about the installation of a 28 foot tall painting by Cristobal de Villalpando in a show at the Metropolitan Museum (“ The Met’s 28-Foot-Tall Visitor”) provides the answers for this one work. All it takes is sixteen riggers, machinists, carpenters and technicians; multiple scissor lifts; 16,000 pounds of sand;dress rehearsals; and five days of work.