WHY DOES LIONEL MESSI WEAR THE JERSEY NUMBER THIRTY AT P.S.G.?

 So why does Lionel Messi wear Jersey number 30 ,thirty  at P/S.G.? Andin French football that jersey number 30 thirty is always worn by a goalkeeper. 

 So Lionel Messi and P.S.G had to go and get permission to let Lionel Messi wear jersey number 30.

 When Lionel Messi started his Barcelona career at 17 years of age, he wore jersey number 30 at Barcelona. He said tht tat number would brig him good  luck