Chief executive apologises to Celtic fans for dismal campaign
Celtic chief executive Peter Lawwell has "sincerely apologised" to supporters for an "unacceptable" season.
Lawwell made the acknowledgement in a letter to season ticket holders.
Tony Mowbray was sacked in March after a poor campaign hit a new low with a 4-0 defeat by St Mirren, despite major investment in the squad in the winter transfer window.
Worse was arguably yet to come though as Celtic lost to Ross County in the Active Nation Scottish Cup semi-finals to ensure their first season without a trophy since 2003, when they had the consolation of a UEFA Cup final appearance.
Lawwell wrote: "This season has been one of the most difficult we have experienced in recent years.
"The club set out with great optimism at the start of the season, with a new management team and with the objective of refreshing the first-team squad and regaining the Scottish Premier League.
"These changes did not deliver the success we hoped for and ultimately, this season has been unacceptable. For this, we sincerely apologise."
Lawwell said: "Our illustrious history has had many highs and lows. We must now move on.
"We must go forward together as the united Celtic family which has been so formidable in the past.
"The disappointment of this season has only made everyone at the club even more determined to ensure that we get back to doing what Celtic does best - winning football matches and, ultimately, winning trophies.
"That can be best achieved if we all work together. Your unique and faithful support is the great and enduring strength of Celtic Football Club."