It feels apt, therefore, that artistic directors Tinatin Gurgenidze, Otar Nemsadze, and Gigi Shukakidze should have chosen the theme of “Correct Mistakes” for the fourth Tbilisi Architecture Biennial, with its multiple meanings, from useful errors to their possible rectification. But two key works in particular seem to structure the exhibition and the biennial: a film and an installation. The split-screen film reveals two facets of the stories of interdependence between the glacier and the Black Sea to which it leads. This gigantic infrastructure, the Black Sea Submarine Cable, will on completion be the world’s longest high-voltage power grid. This biennial is anchored in history, but even more so in the future.