The most powerful of the Black Nobility families are located in Italy, Germany, Switzerland, Britain, Holland and Greece in that order. Their roots may be traced back to the Venetian oligarchs, who are of Khazar extraction, and married into these royal houses in the early part of the twelfth century. (Following a great Khazar victory over the Arabs, the future Emperor, Constantine V, married a Khazar princess and their son became Emperor Leo IV, also known as "Leo the Khazar". The Medecci popes, and Pius XII (Eugenio Pacelli) were Khazars, as is the present Pope, John Paul II. Not all Black Nobility are royal houses, and many of the royal families no longer have kingdoms. According to researcher and author Dr. John Coleman, a "Committee of 300" was established early in the eighteenth century, "although it did not take on its present form until around 1897", (when the China opium trade was legalised)
They supposedly control the vatican, and therefore the RCC.
A chap by the name of Dr Coleman is supposedly an expert on them.
Believe what bits you will, but I also advise research each point personally rather than relying on others.