Gringotts Wizarding Bank

Gringotts is the only known bank of the wizarding world and it is operated primarily by goblins. Wizards and witches keep their money and other valuables in vaults that are protected by very complex and strong security measures. Gringotts also offers Muggle-Wizarding currency exchange.
A snowy white building, near the intersection of Knockturn Alley and Diagon Alley, Gringotts towers over all neighbouring shops. Customers pass through a set of bronze doors and then silver ones before entering the lobby. The main floor is paved with marble and has long counters stretching along its length. The vaults extend for miles under the city and are accessible through rough stone passageways and then by means of magic carts that travel speedily along their tracks. PS Ch.5 The inscription on the front door reads:
Enter, stranger, but take heedOf what awaits the sin of greedFor those who take, but do not earn,Must pay most dearly in their turn.So if you seek beneath our floorsA treasure that was never yours,Thief, you have been warned, bewareOf finding more than treasure there. When Harry first visited Gringotts, he was told by Hagrid that one would have to be mad to try to rob Gringotts.PS Ch.5 Goblins are extremely greedy and would protect their money and valuables at any cost, which makes them ideal guardians for the valuables of the wizarding world. Also according to Hagrid, apart from Hogwarts, Gringotts is considered "the safest place in the world fer anything yeh want to keep safe-".[1] It is rumoured that dragons guard the especially high security vaults.
There are a number of methods to opening the vaults. Most vaults, such as Harry's, use small golden keys. Higher security vaults may have various enchantments upon the doors. For example, the door to Vault 713 [2] needs to be stroked by a certified Gringotts goblin, which causes it to melt away. If anyone but a Gringotts goblin touches the door, the person will be sucked into the vault, which is checked for trapped thieves about once every 10 years.
Gringotts Vault 713 held a small grubby bag, inside of which was the Philosopher's Stone. Albus Dumbledore sent Hagrid to retrieve it while he escorted Harry. PS Ch.5 Later that very same day, Professor Quirrell broke into the vault under orders of Lord Voldemort. Although he was unsuccessful in obtaining the Philosopher's Stone, the break-in shocked the wizarding world because it was practically unheard of for Gringotts to be robbed. The culprit was not caught.
In Harry Potter and the Deathly Hallows, Harry, Ron and Hermoine, aided by a reluctant Griphook in exchange for Godric Gryffindor's sword, attempt to access the vault of Bellatrix Lestrange where a Horcrux, Hufflepuff's cup is likely to be hidden. However, when they go into Bellatrix's vault, which is stocked with all manners of treasure, including Hufflepuff's cup, the Horcrux, they find out that the treasure has had Gemino and Flagrante charms placed on them, causing them to glow red-hot and multiply rapidly whenever they are touched. To add fuel to fire, they are betrayed by Griphook, who summons goblins to capture them, knowing that they would not willingly give up the sword. The trio escape with the Horcrux by clambering onto a half-blind dragon which escapes from Gringotts, however, Griphook has taken the sword. The trio inside the vault and the subsequent escape via dragon is illustrated in the U.K. Edition and the U.S. deluxe edition of the book.
While Gringotts is largely staffed by goblins, including Griphook and Ragnok, it is known that the bank does employ humans. Bill Weasley worked as a curse-breaker for Gringotts in Egypt, retrieving artifacts from ancient Egyptian tombs and pyramids.[3] Fleur Delacour took a part-time job with Gringotts after participating in the Triwizard Tournament, apparently to improve her English skills.