The exhibition “Extraneous” was a quietly devastating addition to this year’s Curated By festival. Assembled by Zasha Colah and Valentina Viviani, the compact group show took as its emblem the Indian tradition of leaving a matka, a clay pot of drinking water, on the street for thirsty passersby as an act of communal hospitality. Foregrounding generosity as a response to violence, the exhibition opened with a series of staggered pedestals, each bearing a sculpture in shades of slate and both fired and unfired clay. Part of Margherita Moscardini’s ongoing project The Fountains of Za’atari, 2015–,