The Old Testament IS Christianity
Thinking otherwise is making the same mistake as the Jews did
Genesis prophecies the "Son of Man" that will bruise the serpents head
The central theme that runs through the Old Testament is the Messiah to come
In Daniel is plainly laid out the time line from his time to the Messiah and from there till the opening of probationary time in which we live now.
Jesus made a reference to Daniel's time period in one of the Gospels when speaking to Peter on forgiveness stating "I say not unto thee, until seven times: but, until seventy times seven" Matt 18:22 70X7 times which gives 490, this is the period of years given to the Jews as forgiveness from God when Daniel pleaded with him in Chapter 9.
Jesus was well aware of the time line when he was in his ministry as in one of the other Gospels he states "...Behold I cast out devils, and do cures today tomorrow and the third day I shall be perfected" Luke 13:32 This was 6 months into his ministry he had three years left just as Daniel stated he would have 3 and 1/2 years from 27AD to 31AD when he was crucified.
In The Bible it states that a day is to be a year "..I have appointed thee each day for a year" Ezekiel 4:6.
In Daniel it displays an historical timeline of empires all the way from Daniel to the one "that is diverse from the others" (Those who know my posts know that I believe this to be the Catholic Church) and shows how it will come to an end.
Incidentally the same quantity that was given to Jesus to build up the Gospel(3 1/2 days) is given to the beast power that wars with the saints(In Daniel and Revelation) to break it down only it is given a great deal more for instead of days it is given years. "..and power was given unto him to continue forty and two months" Rev 13:5 or in Daniel 7:25 "..until a time a times and the dividing of time" So this last power being diverse from the others will rise from the last empire and war against the saints for this period of time.
So 42 months 3 1/2 years was given it, you then have to take each day in that time period and give it a year(42 months times 30 days each) so you end up with 1260 years
In 538AD Belisarius recaptured Rome and Papal Supremacy began. If you place the addition of 1260 years it brings you to 1798. Papal power as it knew it was ceased by General Berthier of France on orders from the General Assembly to dethrone the Pope (This is known as the wound in both Daniel and Revelation)
Revelation is the consummation of the entire Bible in one book, it's symbols, themes and illustrations are represented throughout most of the books that came before it.
There is no portion of The Bible to be left out by Christians because it is all one and the same
As always there is a great deal more to The Bible