I felt this topic is important enough to make its own thread rather than just within the Bartolo Longo thread.

According to Longo's narration of Our Lady of Pompei to Fortuna Agrelli:

La Madonna stessa aveva suggerito il modo che voleva essere pregata da chi avesse maggior bisogno di suo soccorso, cioè facendo tre Novene per impetrar le grazie, e recitando il Rosario intero di quindici poste; ed altre tre Novene con l’aggiunta del Rosario intero per ringraziamento dopo ricevuta la grazia.

Our Lady herself had indicated how she wished to be prayed to by those most in need of her help, namely by making three novenas to obtain graces, and by reciting the entire Rosary of fifteen decades; and three further novenas with the addition of the whole Rosary in thanksgiving after receiving the favor.
...
… incominciò a fare la prima Novena: poi ne intraprese la seconda, e poi anche la terza, recitando ogni giorno il Rosario intero delle quindici decadi, conforme l’indicazione data dalla Vergine alla signorina Agrelli.

“… she began the first novena; then undertook the second, and then the third, reciting each day the entire Rosary of fifteen decades, according to the indication given by the Virgin to Miss Agrelli.
...
Chiunque vuol grazie da me… faccia TRE NOVENE con la recitazione delle 15 poste del Rosario, e TRE NOVENE di ringraziamento.

Whoever wants graces from me… let him make THREE novenas with the recitation of the 15 decades of the Rosary, and THREE novenas in thanksgiving.

Longo here assserts that Our Lady explicitly told Fortuna Aggrelli that the 54-day novena to which she had attached the promises requires the Full Fifteen Decades each day of the 54 days.

Thank you for setting the record straight!

I can't tell you how often I see the "5 Decades" all over the interwebs.

I can't tell you how often I see the "5 Decades" all over the interwebs.

That's because for a hundred years that's what people have been seeing in print.
In 1924 Cardinal Hayes attached the Imprimatur to the booklet printed by Benzinger which showed the novena being prayed with five decades daily.  Burnes & Oates in Dublin also printed it that way the same year.
I wonder how many people would have prayed it if they'd known it should be 15.
For anyone wanting a bookmark for their novena book I offer the following.

Somewhere on the web I saw that when someone begins the Novena, they begin with the Joyful, the next day Sorrowful, and of course the next day Glorious mysteries; and the sequence must be kept regardless of the mysteries that would normally be offered for, say Fridays ( Sorrowful).

The Official Sanctuary site also says 5 decades, in case you ask.
 +W always encouraged 15 decades prayed DAILY.RIP+
Luminous mysteries don't belong, ..good for the Sanctuary.

Longo is the closest thing to a primary source, and he cleary says 15 Decades per day for the 54 Days, and attributes the mention of the 15 to Our Lady, but I keep seeing these sites claiming that it has to be 54 of the 5-Decade Rosary (since after some time, the 5-decade became so popular as to become synonymous with "the Rosary", that they undoubtedly just assumed that, and then Sister Lucy clarified that for the First Saturday Our Lady only requested 5 ... so it probably got conflated).  This rotation of J-S-G-J-S-G was certainly contrived after the fact by people trying to figure out how to to this continuously for 54 days.

In other words, the point of this thread is to debunk all those interwebs sites claiming 5-Decades, as there's ZERO support for the 5-Decades having been requested by Our Lady to Fortuna Agrelli, and every reason to accept Longo's account that she specifically asked for 15.

I have no opinion, just citing web sites ...

Yes, and we have to be careful about the interwebs, since it's a well-known phenomenon that one or two site print something, and then other sites just copy+paste it all over the place, and its repeated occurrence creates the impression in people's minds that they all independently confirm the same thing, when in point of fact they all derive from some original mistake, or just someone making something up.

The novena is prayed using your Dominican rosary.

Here is the book with the prayers for each decade.  It is from 1954 but I compared it to the 1925 and it's identical page for page.  This copy has not changed for the last 100 years.

https://archive.org/details/rosarynovenastoo00lace/mode/2up

Right, but what's at issue is what Our Lady of Pompei told Forutna Agrelli, since many people rely upon her promise regarding the 54-day Rosary Novena, and the source closest to the original promises is Bartolo Longo, who basically quotes Our Lady as specifically requesting the "entire" Rosary of "15 decades", phrases he uses more than once.

You can do what you want, of course, since 5 decades is better than nothing ... I'm merely pointing out what Our Lady herself requested.

Do you have the source for Longo's writing that you posted? Italian.

https://prieresetespoir.home.blog/wp-content/uploads/2019/08/neuvaine-miraculeuse-de-54-jours-du-rosaire-aout-octobre-2019b.pdf
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So this link to a French site looks like it requires the 15 decade Rosary everyday.

My french is almost non existent, but checking the site you posted I see the chart states five decades per day.  Where do you see the 15 decades?

Does anyone have a source (who added them) for the daily prayers before, for each decade, Spiritual Communion and after?  Doesn't appear that Our Lady dictated them.

Link to an English site: 15 decades per day, Please check to see if that is the case.

https://www.epiphanymn.org/wp-content/uploads/2018/07/54-Day-Rosary-Novena-in-Honor-of-Our-Lady-of-Pompeii.pdf

( Link automatically downloads in Downloads folder)...


Another site in French repeats : 15 decades / day.

I don't see charts here...
"...

Sanctify yourself, and sanctify others."

How to pray the novena
The Pompeian Novena lasts 54 days. Every day we pray 15 decades of the Rosary (the Joyful, Sorrowful, and Glorious Mysteries).
The prayer is divided into two parts:..."

Another site: According to the indications of Our Lady, we say 15 decades...

Sorry for any confusion.
Pray for peace.