Assassin's Creed Unity Leo Nostradamus Enigma guide
Michael Green
Published Apr 13, 2026
Leo Enigma Starting Location
1st Leo Riddle Solution
Above the dark shadowsOf the erstwhile bastion,
The tall square Sentinel silently watches
The 9th month spill his blood.
I spent hours until I managed to solve this riddle. “The 9th month spill his blood” seemed to refer to September Massacres of the French revolution when prisoners were killed. I vent to the Bastille but found no solution there. I started looking for other prisons through google but nothing significant came up. Erstwhile bastion suggested it was another fortress that had significance before the Bastille. I then went scouting nearby landmark, but that didn’t help. I noticed though that visiting significant landmarks unlocked database entires so I widened my search until I unlocked Grand Châtelet database entry that said “..this prison was once a fortress”, which matched the description of being a fortress and then a prison whose prisoners got massacred in the 9th month. I found the solution to the first riddle on top of the square tower (tall square Sentinel …).
2nd Leo Riddle Solution
The martyrs of Herod,In their ageless temple,
Haunt the alchemist’s tones,
With their macabre, soundless dance.
Google search for “Martyrs of Herod Paris” returned an entry about Holy Innocents. One of the previous landmarks I discovered (and got the database entry for it) was Cimetière des Saints-Innocents. Turns out the solution to the second Leo Enigma riddle is at that cemetery (which is now defunct according to the Wikipedia article).
3rd Leo Riddle Solution
In the Belly of the World,The Saint of the Holy Stag
Still waits for his Austral hand
To reach the godly heavens.
“Belly of the World Paris” Google search returned an entry about Le Ventre de Paris (Stomach of Paris) which turns out to be Les Halles de Paris – central market center in Paris. This market is area just north of where you got the final riddle. There is a landmark there for Église St. Eustache church and that is where I found the solution to the third riddle. BTW, there is a database entry for this landmark and apparently St. Eustache’s symbol is a large stag dear (the more you know…)