Starting from block 139690 (05/08/2011) a miner named Eligius started to inscribe a Catholic Prayer in Latin in some coinbase messages.

Block 139690 coinbase tx hash: cbbaa0a64924fe1d6ace3352f23242aa0028d4e0ff6ae8ed615244d66079cfb1 hexdump (partial):

"Eligius/Benedictus Deus. Benedictum Nomen Sanctum eius." -> block 139690 "Benedictus Iesus Christus, verus Deus et verus homo." -> block 139792 "Benedictum Nomen Iesu." -> block 139831 "Benedictum Cor eius sacratissimum." -> block 139898 "Benedictus Sanguis eius pretiosissimus." -> block 139904 "Benedictus Iesus in sanctissimo altaris Sacramento." -> block 139921 "Benedictus Sanctus Spiritus, Paraclitus." -> block 139942 "Benedicta excelsa Mater Dei, Maria sanctissima." -> block 139977 "Benedicta sancta eius et immaculata Conceptio." -> block 139990 "In nomine Patris et Filii et Spiritus Sancti. Amen." -> block 140181

This is a Catholic prayer composed in 1797 in Latin by the Italian Luigi Felici for the purpose of making reparation after saying or hearing sacrilege or blasphemy.