The Twin Towers may have gone, and FA Cup semi-finals arrived, but Wembley Stadium still holds an irresistible aura. On Sunday, it is 90 years since the front doors first opened and in recognition of this particular birthday, Sportsmail has been granted access to the vault of photographs which tell the history of the grand old ground. We have unearthed previously unseen pictures from the very beginning to the modern day, from the minutiae to the magnificent. They offer a hidden insight of life witnessed during nine decades of existence. There is a shot of workmen surveying a freshly built Wembley from atop wooden scaffolding surrounding one of the towers in 1923. Ladders are propped up against the construction, which at that point is relatively indistinguishable from the iconic 126-foot tall structure it would become; perhaps resembling more the makings of a helter skelter. Health and safety has come a long way. Taking shape: Labourers hard at work on one of the famous Twin Towers