Mach more oversees than the Tuscan Sea:

A Gaulish branch will hold Florence,

In its scope of agreement nautical Rane.

The 1 line. Cosimo I of the Medici (1519-1574) was the ancestor of the most rich and noble Italian family Medici. Charles V made Cosimo the hereditary Duke of Florence in 1537. In 1569 Pope Pius V in Rome crowned him the Grand Duke of Tuscany. During his reign, the duchy flourished: its territory doubled, the fleet was built and the Uffizi gallery.

The 3 line. The Medici family gave the French two queens: Catherine, the wife of Henry II and Maria the wife of Henry IV. From the second pair began a new branch of the kings of France – the Bourbon.

Linkage with other quatrains: 5.6.

Probable decoding of number 5.3. 500-3=497, if 4 to put at the end, to flip 9 in 6, 6-1=5 then we will get 574 – the year of death.

Quatrain 5.76* Pope Sixtus V

En lieu libere tendra son pauillon,

Et ne voudra en citez prendre place:

Aix, Carpen, l'Isle volce mont Cauaillon

Par tout les lieux abolira la trasse.

In a free place will he pitch his tent,

And he will not want to lodge in the cities:

Aix, Carpentras, L'Isle, Vaucluse 'Mont,' Cavaillon,

Throughout all these places will he abolish his trace.