HITC Sport begins a countdown of the greatest 30 players to have turned out for the Bhoys.
With such a rich history, Celtic have been the home of some top-class talents throughout the club's 128-year existence and number 30 on the list is a player who was already 33 by the time he joined the club, but quickly became a cult hero at Parkhead.
Lubomir Moravcik joined the Bhoys in 1998 amidst a torrent of doubts about his age and unknown status, but he soon won over fans and media alike with some sparkling performances.
Two weeks after his arrival his hero status was assured as he scored his first two goals for the club in a 5-1 thrashing of Old Firm rivals Rangers, the first of a tally of 35 he would rack up in four years and 129 appearances in Scotland.
'Lubo' was a true flair player, a skilled and classy creative midfielder equally adept with both feet, and he quickly formed a devastating partnership with the legendary Henrik Larsson.
In his third season at the club the Slovakian scored 14 goals in 40 games from midfield as he won the first major trophies of his career by playing a starring role in leading Martin O'Neill's side to the Scottish treble, scoring another fine brace in the final Old Firm match of the season at Ibrox.
He helped the club retain the SPL title the following season, in what turned out to be his final campaign for the Bhoys before leaving for Japan in 2002.
After nutmegging Czech legend and 2003 Ballon d'Or winner Pavel Nedved in a Champions League match, the Juventus star later said he felt lucky to have played at Celtic Park at the same time as Moravcik, and the Slovakian remains one of the most naturally gifted players to have worn the Celtic colours in recent memory.