Celtic are facing a hugely important summer as they aim to rebuild under new manager Ange Postecoglou and it is vital that he is backed properly in the transfer market.
Liam Shaw, Joey Dawson and Osaze Urhoghide have already been snapped up by Celtic this summer, but they will know they need more quality additions to the squad if they are going to be able to overhaul Rangers and avoid missing out on the league title for a second successive campaign.
Postecoglou seems like a potentially decent fit for the role at Celtic this summer, but this is by far the toughest assignment that a manager at Celtic Park has been handed for some time with Rangers looking strong under Steven Gerrard after winning the league last term.
While we wait to see what happens with Celtic during the rest of the summer, we have put together a quiz to test your knowledge on the Scottish giants and ask 20 questions on the biggest ever moments in their history. Can you get 20/20!