1843 they started to build this; with horse & cart I don't think so. We cannot build anything like this today. Clearly there was another civilisation far more advanced then we are today who built this stunning building.
Terrible computer voice! I could not stand watching the video because of it. Also, as stated by PinkPanther 4958, there should be no THE before Big Ben.
The Big Ben? Most of us in the UK just call it Big Ben without THE at the beginning.
Corrected
Thank you for your comment :)