"You are Peter (pietros, ie Rock), and upon this rock I will build my Church "
1st Pope--the line of Popes can be traced back to him (ie we have the names and dates )
ie, Jesus made him head of His Church. And before you say "but it isn't the same Church", there are writings from as early as 70-80AD (ie, before some of the books of the Bible were written) that acknowledge the bishop of Rome (ie, the Pope) as primus inter pares---ie 1st among equals.
FYI