There are seven suburbicarian sees: Ostia, Albano, Porto and Santa Rufina, Palestrina, Sabina and Mentana, Frascati and Velletri. Velletri was united with Ostia from 1150 until 1914, when Pope Pius X separated them again, but decreed that whatever cardinal bishop became Dean of the College of Cardinals would keep the suburbicarian see he already held, adding to it that of Ostia, with the result that there continued to be only six cardinal bishops. COUNT 4
QSN1 How many suburbicarian sees? ANS1 seven QSN2 When were the two sees combined?  ANS2 1150 until 1914 QSN3 Who separated them? ANS3 Pope Pius X QSN4 What are the seven sees? ANS4 Ostia, Albano, Porto and Santa Rufina, Palestrina, Sabina and Mentana, Frascati and Velletri