10 Christian Martyrs Brutally Slain For Their Beliefs
Originally, the term applied to any individual who suffered for Christianity, but in the end, the so-called baptism in blood was reserved for those killed for their faith. Such self-sacrifice is a source of inspiration for other Christians despite what non-believers might think. In the second century, church father Tertullian even stated, the blood of martyrs is the seed of the church.
I question how many pagans were simply converted after hearing the joys of Christianity. Still a good read for a bit of religious history.