At its foundation, Christianity is based on evidence.
First Corinthians 15 recounts the critical core of Christianity: the resurrection of Jesus of Nazareth. Without Jesus’ resurrection (a historical event), there is no Christianity and no hope for a future in heaven (a theological assertion).
If Jesus is nothing more than an embellished legend, then the hope of heaven is little more than a wish. In order for Christianity to be true, it must include a belief in certain historical facts and a belief that the Bible preserves an accurate account of those events. This establishes the identity of Jesus as the resurrected Savior.
In this sense, theology can’t be separated from history. Rather, theology depends on history. — Kenneth Samples (from, 5 Levels of Christian Faith)