The Tower of London is the fortress on the north bank in the City of London. Evie infiltrates it to stop Lucy Thorne in A Thorne in the Side, the twins steal back the Koh-i-Noor there in The Last Maharaja, and Lydia returns in 1916.
Thorne's men pose as Royal Guards while she hunts for the Shroud. Evie frees Constable Miller and disguises herself as a prisoner to reach her.
Evie assassinates Lucy Thorne and escapes as the real guard retakes the Tower. The Shroud had already been moved.
During a gala, Templars plant the diamond on Duleep Singh to frame him. Jacob recovers it and Evie smuggles it out.
A spy called the Magpie is held here and threatens to reveal the Brotherhood. Lydia Frye gets in and kills him.
Edward Kenway hid the Shroud's cache in the Tower in the 1720s or 1730s, but Prince Albert found it in 1847 and moved it to a vault under Buckingham Palace, which is why Evie comes away with Thorne's key but no artifact. Henry Green has an ally in the Tower guard who helps her get in.
A Thorne in the Side runs between A Spot of Tea and A Bad Penny. In The Last Maharaja, the gala celebrates the royal armoury: Jacob goes in with Duleep while Evie secures the outside, and Jacob wears his suit, the same outfit as at the Queen's ball. Back in 1696, the counterfeiter William Chaloner was held in the Tower after Omar Khaled and Isaac Newton exposed him.
Bank of England
The Bank of England is the City of London's central bank and the target of Sequence 6, A Run on the Bank, where Jacob tracks a Templar robbing its branches. You return to its vault twice more: once for the stolen printing plates and once in The Last Maharaja.
Black Swan Yard
Black Swan Yard is one of Bloody Nora's three Blighter strongholds in the City of London, set beside the river. Capturing it for the Rooks is part of taking the borough.
Cannon Street station
Cannon Street station is a City of London rail stop on the north bank of the Thames. In the Jack the Ripper expansion it is where four of Jack's gang lieutenants gather, and Evie clears them out.
Field Lane
Field Lane is one of Bloody Nora's three Blighter strongholds in the City of London. Taking it from the Blighters is a step toward the City gang war.