Hundreds of people turned out for an interactive birthday party to mark the completion of a year-long programme of redevelopment, and the 10th anniversary of the Weston Park Museum reopening in 2006.
Visitors to today's birthday celebrations were able to enjoy the museum’s brand new Picturing Sheffield art gallery and new displays in What on Earth natural science gallery which make their debut this month.
The new displays join Beneath Your Feet, a new showcase for the treasures in the city’s archaeology collection, and a series of new additions to Sheffield Life & Times exploring sport, protest and shopping in the city which opened during the summer.
Kirstie Hamilton, Head of Exhibitions and Displays at Museums Sheffield said: "We've got two whole new galleries and lots of displays throughout so it's great.
"We've also got so many activities going on today so there's cake, there's face-painting, there's badge making, Cabaret Boom Boom so we'd really love to see you down here."
Star competition winners Jill Hartley and Tom Hartley and their two children Owen and Isla were treated to a personal tour of the new exhibitions and were given early admission to the museum as well as being given £50 of lunch vouchers for the Weston Park Museum Café.
Jill said: "It's been brilliant, we've really enjoyed looking round the exhibitions. Especially the dinosaurs.
The 38-year-old added: "We enjoyed being able to look round before anyone was in too. There are lots of interactive bits which the children liked taking part in."
Picturing Sheffield has seen a total transformation of the museum’s art gallery, creating a brand new visual celebration of the city.
The gallery, now displayed in a Victorian salon hang, boasts more than 60 scenes of Sheffield dating from early 1800s right through to the present day.
Amongst the works on display is visitor favourite The Misses Vickers (1884) by John Singer Sargent and Stanley Royle’s Sheffield Quartet (1923), four evocative views of the city reunited for the Graves Gallery Stanley Royle exhibition of 2014.
Also on show are Joe Scarborough’s painting People Dancing to Bands (1996), Pete McKee’s A Perfect Day (2013) and Jo Peel’s Owlerton Stadium, Sheffield (2012). Visitors will be able to share their own views of Sheffield in the gallery, as well as creating their own city landscapes using several new interactives.