Finally, at age 96, Beverly Pepper is getting the credit she deserves. Recent revelations that Pepper worked with Cor-ten steel years before Richard Serra discovered the material and a belated recognition that she pioneered linking sculpture to landscape, cement the artist’s place at the vanguard of innovation. Pepper came late to sculpture. The artist was already forty years old and living in Italy, when she got introduced to David Smith and, in a baptism by fire, learned welding and metal work in a factory in the small town of Spoletto. A series of recent large-scale works circle back to the artist’s infatuation with Cor-ten steel. The monumental works are at once poetic and bold. Dynamic half-circles and buoyant loops in a weathered patina seemingly defy laws of physics and affirm Pepper’s superior proficiency with materiality, color and form. The illustrious art critic Clement Greenberg was supposed to have told Pepper once that women can never be great sculptors. It is fair to say that she proved him wrong. At Marlborough Gallery through March 23.