6th Church- Philadelphia and 7th- Laodicea
They are within the same period, that is fulfilling now, until the arrival of Christ; at the peak of the Bible number 7 is universal, and the infinite of God, like the 6 days of creation. Genesis 2:
3- And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made. (Rested from all the work He had)
Aren´t all days blessed and sanctified by God?
(The Jews think that only the 7th day: Saturday; Christians, Sunday; and Muslims, Friday. They don´t understand till today!).
We can also compare with Christ, with all the Power He has in Heaven, to open the 7 seals, and so he´ll come in the 2nd arrival, not as the pacific Lamb of the 1st arrival, but as the Lion of Judah and also how it says in Revelation 5:
6- (...) stood a Lamb as it had been slain,

having seven horns, (giving power to all 7 angels of seven churches) and seven eyes, which are the seven Spirits of God sent forth into all the earth. (Is the spirit of the Father, who sees all and is in every one, who obeys him in the face of the earth).
Laodicea, the 7th and last Church.
Rev: 3. 14- 22. Embraces all Churches and Congregations in the face of the earth. The Angel of the 7th Church - Laodicea, is the responsible of each one of these tens of thousands of Churches and Congregations that are there (it is said that there are over 25 thousand, in the year 2000), all divided, corrupt and blind, all of them thinking that they are right and true. At the beginning of the 7 churches, Jesus puts himself with a feature in this last one, the Church of Laodicea. He says in Rev. 3:
14- And unto the angel of the church of the Laodiceans write; These things saith the Amen , (end, Omega) the faithful and true witness, the beginning of the creation of God; (Because now at the end all of them are unfaithful with a fake Christ)