<p>For nearly 150 years, the wretched, squalid tenements of Dublin were widely judged to be the worst slums in all of Europe. By the 1930s, 6,400 tenements were occupied by almost 112,000 tenants. Some districts had up to 800 people to the acre, up to 100 occupants in one building, and twenty family members crammed into a single tiny room. It was a hard world of hunger, disease, high mortality, unemployment, heavy drinking, prostitution and gang ...