Are there any real pictures of black holes?

For now, black holes themselves are invisible to our telescopes, due to the fact that gravity prevents light from exiting a black hole.
When our telescopes capture images of regions dominated by black holes, we can only see the accretion disc (see previous post), as in matter circling the object. NASA has repeatedly tried (and keeps doing so) to capture a detailed image of the supermassive black hole at the center of the Milky Way, Sagittarius A*. The Event Horizon Telescope has managed to take a series of images of Sgr A* between April 4 and 15, 2017, offering an X-ray close-up of the accretion disc, not the black hole itself. 

A different approach has been presented by a series of photos taken by the Chandra Telescope, measuring the sound waves of the central region of the Perseus galaxy cluster, dominated by a supermassive black hole. Here is a side by side image from the Chandra Telescope of the accretion disc in 3 colors (in X-ray) and of the black hole imaged in sound waves. – Roman Alexander

(The question was originally asked by Christian Jacobs)