The competitive nature of the Scottish top flight is something that will always be questioned, but it cannot be denied that Celtic are regarded as one of the most successful clubs in world football when it comes to winning domestic trophies. Since they were founded in 1887, the Bhoys have won 46 league titles, 36 Scottish Cups and 15 League Cups. That kind of record effectively means that there is disappointment in Glasgow if a league and cup double is not achieved in any given season. Celtic were also crowned European champions in 1967 - so it does not take a genius to work out that the manager at the helm during that campaign features highly in this list - but he still faces competition for the number-one position. It is safe to say that the likes of John Barnes and Tony Mowbray do not feature in our rankings, but with more than 10 occupants of the dugout having won trophies at Celtic Park, some of your favourites may not rank as highly as you would expect in our list of the greatest ever managers to be placed in charge of the Old Firm giants.