Emir of Qatar dresses Messi with Bisht 

A Bisht is usually worn for prestige on special occasions such as weddings, or festivals such as Eid, or for Ṣalāt al-Jumuʿah or Salat al-Janazah. It is usually worn by secular officials or clergy, including tribal chiefs, kings, and imams.

It is a status garment, associated with royalty, religious position, wealth, and ceremonial occasions

Culturally, dressing someone in a “Bisht” (the robe) is an act of courtesy & high appreciation in Qatar.