I think you are confusing the Great pyramids of Pisa with the Leaning Tower of Babel. Scripture clearly says that this was subcontracted out by McAlpine and like their shoddy work on the Stonhenge Entertainment complex, was never finished due to budget constraints.
Noah & Son's commissioning of the the Ark to Harland & Wolff met with similar difficulties: It's maiden voyage from the Port of Eden went somewhat awry when the largest ocean liner then built ran aground atop a high promontary in Armenia. Luckily, the "THIS WAY UP" sign on the side of the boat ensured the passengers, crew and menagerie a safe passage.
That being said, it is obvious to any individual having the erudition bestowed upon them by our great god Ming The Merciless, all of these events took place sometime between the Silurian period in the Paleozoic era and the first episode of On The Buses.