1950 Break-In of Gringotts Wizarding Bank

"Believed to be the work of Dark wizards or witches unkown, Gringotts goblins were acknowledging the breach insist nothing was taken. The vault in question number 713 had in fact been emptied earlier that very same day."

The Break-In of Gringotts Wizarding Bank on September 1, 1950, was an attempt by Quirinus Quirrel (at the time High Governor of Hogwarts School of Witchcraft and Wizardry) to steal the Philosopher's Stone, which was being kept in Vault 713 of Gringotts Wizarding Bank. However, that same day, Albus Dumbledore (accompanied by young Regulus Arcturus Black) removed the Philosopher's Stone from the vault. The robbery was reported in the Daily Prophet, and the fact that someone had breached the security of Gringotts and was not caught created a great public scandal. This was the first time anyone had successfully broken into the bank, and it was the last. As mentioned by Griphook, the Gringotts goblins do not consider this to be a truly successul break-in for the vault was already emptied to nothing could be stolen.

Regulus Arcturus Black first learned of the break-in from James on the Hogwarts Express. It was later reported in more detail in a copy of the Daily Prophet which he read when he and James Potter were having breakfast. This led Tom, James, Pansy Parkinson, and Astoria Greengrass (The Marauders) to investigate the attempted theft, and they began to suspect that the current Defence Against the Dark Arts Professor, Galatea Merrythought, was behind the break in. When Regulus caught Quirinus Quirrel trying to get it again in its new hiding place in a restricted area at Hogwarts Castle, Reglus realised the Governor was the real culprit.