What does that question have to do with the thread's theme?
There were lots of people in the Upper Room. We see in Acts 1 a number of 120. We do not know the number in that upper room on the day of Pentecost. But, Peter preached to the Jews that were present. That was Peter's ministry, to the JEWS. Paul, the oft overlooked (by RC's) writer of most of the New Testament, was the ministers to the world at large. If anyone holds the role of the earthly head of the new church, it would be Paul.
You can keep posting all of your catechism teachings, but It does not agree with Scripture on the basic tenets of Christianity. Only the Word of God, as led by His Holy Spirit, illuminates our hearts to believe!
Acts 2" 17 “‘In the last days, God says,
I will pour out my Spirit on all people.
Your sons and daughters will prophesy,
your young men will see visions,
your old men will dream dreams.
18 Even on my servants, both men and women,
I will pour out my Spirit in those days,
and they will prophesy.
19 I will show wonders in the heavens above
and signs on the earth below,
blood and fire and billows of smoke.
20 The sun will be turned to darkness
and the moon to blood
before the coming of the great and glorious day of the Lord.
21 And everyone who calls
on the name of the Lord will be saved.’
