Empty tomb of Jesus

Islamic beliefs include Jesus ascension to heaven and that he was never crucified. Someone else was crucified. 

You can read further here 

https://islamqa.info/en/answers/103515/who-was-the-person-who-was-made-to-resemble-eesa-peace-be-upon-him

The gospels, the multiple versions of biography of Jesus were written letter and some of them contained the disputed fact of empty tomb of Jesus. Of course, in Islamic belief, Jesus did not even die. 

Then I found this article which is something worth to read as he gives a chronological order of when this idea of 'empty tomb of Jesus' was inserted into Christian literatures, after it was not present prior to that. 

 https://www.reddit.com/r/DebateAChristian/comments/3br2bz/there_was_no_empty_tomb_until_mark_published_his/

Interesting part of Christianity was Paul supposedly heard Jesus after Jesus had 'died' however he himself never had seen or heard the voice Jesus when Jesus was 'alive'. Remember, there were no audio of Jesus for he to cross check. However, this person was made the main source of beliefs in Christianity. And it was easy for the pagan Romans in 4th century to create Pagan Christianity of Trinity that we know today.