In the year of the conquest of Mecca the Prophet ﷺ entered Mecca, wearing a helmet on his head.  

أَنَّ النَّبِيَّ ﷺ دَخَلَ مَكَّةَ عَامَ الْفَتْحِ وَعَلَى رَأْسِهِ الْمِغْفَرُ