Want more? Jonh Paul II was Archbishop of Krakow, elevated to Cardinal.
Here is how the riddle "De labore Solis" becomes more clear.
De labore Solis may be also an allusion to the place where LABOR (i.e. work, paper, book) ABOUT THE SUN , a monumetal discovery of Nicolaus Copernicus/ Nikolaj Kopernik was made. "De revolutionibus orbium coelestium" Heliocentic theory changed the world.
Also, Gloria olivae may also mean a converted Jew, someone linked to Jews or helping Jews reach the apex in some field. Or, someone from Latin America (Spain's glory)
Spain's glory is my bet. I'm actually going with the Brazilian.