At the heart of the exhibition are two deceased artists, Issa Samb and Beverly Buchanan , whose ways of thinking animate “In Minor Keys,” with multiple galleries, called “Shrines,” in the Central Pavilion dedicated to their work. In one section, we see a translation of Samb’s  La Cour  ( The Yard ), his “permanent and ever-evolving installation of a courtyard-home-studio,” which Kouoh picked as the most influential work of the 2010s; a video by Adrienne Edwards, projected over some of his sculptures, gives life to this. Most impressive here is the love and care given to Buchanan and her expansive practice. Underrecognized for her groundbreaking contributions to Land Art, Buchanan comes into full focus in “In Minor Keys.” In one room, video documentation maps many of her earthworks series—small monuments alongside roadways that mark space and can easily go unnoticed.…