A yellow or white tower was added, intermittently, from the 1950s onwards. The primary reason for this seems to be to represent "Anne Boleyn’s Tower", the most notable feature of Green Street House, an originally Tudor group of buildings which stood next to the Boleyn Ground until demolished in 1955. Green Street House was also known as "Boleyn Castle" through an association with Anne Boleyn. The manor was reputedly one of the sites at which Henry VIII courted his second queen, though there is no documentary evidence to support the tradition. There are a number of other factors which may have influenced the inclusion of the stylised castle feature, for instance:  A shield has been used in many iterations of the club badge, and the shape of the 2016 version matches the cross-section on the hull of HMS Warrior, the most famous ship built by the Thames Ironworks. However examining draughtsman's diagrams of the ship casts doubt on the resemblance between the shield and the ship. The crest was redesigned and updated in the late 1990s, featuring a wider yellow castle with fewer cruciform "windows" along with the peaked roofs being removed; the tops of the towers had previously made the castle appear more akin to Disneyland's Sleeping Beauty's Castle than a functioning fortress. The designer also altered other details to give a more substantial feel to the iconography. When the club rebuilt the west stand of the Boleyn Ground (construction finished 2001–02) the "castle" from the redesigned badge was incorporated into the structure at the main entrance to the ground. A pair of towers were prominent features of the ground's appearance, both bearing large club badges. A new badge was introduced following the end of the 2015–16 season, when the club moved into the Olympic Stadium. It removes the Boleyn Castle due to the club moving away, leaving just the crossed hammers, which the club says is inspired by the crest before and during the career of Bobby Moore. The word "London" was introduced below to "establish the club firmly on the international stage", and the more minimalist approach is to give a "strong statement that is instantly West Ham United". The shape of the crest is that of the hull of , the first ironclad warship in the Royal Navy, which was built by Thames Ironworks. The original colours of the team were dark blue, due to Thames Ironworks chairman Arnold Hills being a former student of Oxford University (see Oxford blue). However, the team used a variety of kits including the claret and sky blue house colours of Thames Ironworks, as well as sky blue or white kit.