Studio Drift, the Dutch artist team, has combined drones with architecture in a novel way. They've collaborated with drone show company Drone Stories to visually complete architectural landmarks, like the Colosseum and the Sagrada Familia, that have been damaged or are incomplete.

"These large-scale aerial displays draw on detailed architectural data and 3D scans, enabling the drones to trace full-scale outlines of how the buildings may have originally appeared. The result is a mesmerizing harmony of innovation and nostalgia—a floating tribute to the beauty of what once was."

It's a pity that the technology wasn't viable until recently. I know we're now two decades past 9/11, but I lived in downtown Manhattan at the time, and those memories are seared into my brain. The drone treatment would have been more striking than those "Tribute in Light" xenon beams.