When was the first black hole imaged by the Event Horizon Telescope?

In 2019, the Event Horizon Telescope collaboration unveiled the first image of a black hole, the supermassive object at the center of galaxy M87, known as M87*. The image showed a bright ring of hot material surrounding a dark central shadow. The observation required a planet-sized virtual telescope made from radio dishes around the world. It was a landmark moment in astrophysics and a dramatic confirmation of black hole theory.