The plaque on the wall says "Here at the home of Dmitry Venebitinov, Aleksandr Pushkin first read Boris Godunov, 1826" It was October 20, 1826. He had finished it in exile and back in Moscow read it to friends. It was finally published a few years later.
The building is still here today (2011) and is gray and haggard.
Photo by my grandfather David C. Cook. Scanned from an unlabeled Kodachrome slide, date stamped October 1969 and numbered W2 8. In an unlabeled slide cartridge.