In 1059, the right of electing the pope was reserved to <answer>the principal clergy of Rome and the bishops of the seven suburbicarian sees.</answer> In the 12th century the practice of appointing ecclesiastics from outside Rome as cardinals began, with each of them assigned a church in Rome as his titular church or linked with one of the suburbicarian dioceses, while still being incardinated in a diocese other than that of Rome.[citation needed]
In 1059, who was responsible for electing the pope? 
the principal clergy of Rome and the bishops of the seven suburbicarian sees.