Take a look back through these pictures which show when it all started and the city centre landscape changed forever.
1. Piece of history
The Old Castle Market built on top of the remains of Sheffield Castle, which could still be seen via guided tours. Photo: JPI Media
2. Standing empty
The market closed in 2013 when the Moor Market opened on The Moor and the site stood empty for two years before demolition started Photo: Chris Etchells
3. Bringing it down
The oldest part of the building was the Fish and Vegetable Market, constructed in the inter-war period Photo: Chris Etchells
4. Bring in the bobcat
The remainder of the Old Castle Market was constructed between 1960 and 1965 Photo: Chris Etchells