1709 - the first dock in the world was built in Liverpool.
Wet dock?
Yes, the world's first commercial wet dock "the old dock"...
It was their main HQ in England. About 25% (I think) larger than their next biggest base.The Romans preferred Chester.
Can you still go on tours to see it?
1st mosque in the UK I believe, converted house in Toxteth.
http://en.m.wikipedia.org/wiki/Abdullah_Quilliam