The prophecy of Bl. Tommasuccio might come up a lot these days (it came up in another forum I participate in), so I did a little research into it.
This passage of the prophecy is from a pretty long poem which explains the schism in more detail. Earlier in the prophecy, there is a reference to the coming of a Pope from across the mountains who is actually an antipope, “false and not a Catholic true vicar of God.” *(L uno de oltramonte sera apostolicho falzo e non chactolicho de dio vero vicario.) He’s the schismatic being referenced. *
The other big issue is that the manuscripts differ on how many years after the millennium. Some say “dece” or ten (not twelve), but others say “quatro cento et dece” or 410—so it could be the year 1410 that is being referenced rather than 2010.
The latter actually makes the most sense as all the other details of the prophecy are tied together neatly in that time period. *The antipope referenced is Robert of Geneva (“Clement VII”) who came from across the mountains–he was from Geneva and he was elected by French Cardinals in opposition to the Italian, Urban VI—to start the Great Western Schism. *He tried to reside in Italy but the Italians opposed him (the prophecy says he fell “into the scorn of the Italian faithful”) and he fled to Avignon. *Finally, the Great Western Schism was ended between 1414 and 1418 (which is just passed 410 years after the millennium) at the Council of Constance, with the election of Martin V, who was accepted by all the faithful. *He helped restore order in the Church, especially in Rome, so much so that the Catholic Encyclopedia’s article on him actually says that after Martin’s work “practically a new Rome had risen from the ruins.”
Personally, I think this is a pretty impressive spot-on prophecy about the Great Western Schism, which happened right after Bl. Tommasuccio predicted it (he wrote this around 1348 and died in 1377; Clement VII was elected in 1378), rather than a vague and difficult to apply prophecy meant for our time. *
EDIT: here’s the original in pdf form.* The actual text begins on page 151.
archive.org/download/ProfezieDelBeatoTomasuccio/ProfezieDelBeatoTomasuccio.pdf