The mysterious line, or Sword of St. Michael the Archangel, is marked by seven monasteries dedicated to Him.
Where there were appearances that gave sufficient motives for the constructions of places of worship.
The monasteries are aligned in a straight line that takes into account the curvature of the earth.
1. Skellig Michael, off the coast of Ireland.
2. Mount Saint-Michel, on the Cornish coast of England.
3. Mont Saint Michel, on the Normandy coast in France.
4. Sacra San Michele, in the Alps of Italy.
5. Monte Santangelo, on Mount Gargano in Italy.
6. Symi Orthodox Monastery, on the island of Symi of Greece.
7. Mount Carmel Monastery, Haifa, Israel.