The harmonic problems have concerned christians since the four Gospels were circulating. The first attempt of wich we have news was the Diathessaron wich not only failed to provide a solution but included several apocrifa. The Diathessaron quikly subtitued the four Gospels in popularity, but - thamks God - it was prohibited and burned. Agustine is the next to do an effort to fix the harmonic problems, but his work resulted insuficient. We have no news of any other attempt to solve the harmonic problem; not until the XX Century. Is then the last years wich produced more works pproposing different solutions, but no one claiming to be satisfactory, but recognicing the obstacles that couldent be superated. How important can be a final harmony, providing a satisfactory solution for all the harmonic problems?