They were the places where generations of Doncastrians earned a crust and began their working lives - but many of these factories, offices and workplaces are no longer with us.
Once more, we've delved into our archives to bring you some memories of some of the town's best remembered workplaces.
Huge operations like ICI and International Harversters, which employed thousands of men and women down the years, met their fate years ago and were reduced to rubble.
Others, like Rockware Glass, live on, but under new names.
Enjoy a trip down memory lane and see if you can recall some of Doncaster's lost factories and workplaces.
We'll have part two of our gallery tomorrow.