Relics that are claimed to be the Holy Nails with which Jesus was crucified are objects of veneration among some Christians, particularly Roman Catholics and the Eastern Orthodox. In Christian symbolism and art, they figure among the Arma Christi or Instruments of the Passion, the objects associated with the Passion of Jesus. Like the other Instruments, the Holy Nails have become an object of veneration among many Christians and have been pictured in paintings. The authenticity of these relics is doubtful. The Catholic Encyclopedia wrote: Very little reliance can be placed upon the authenticity of the thirty or more holy nails which are still venerated, or which have been venerated until recent times, in such treasuries as that of Santa Croce in Rome, or those of Venice, Aachen, the Escurial, Nuremberg, Prague, etc. Probably the majority began by professing to be facsimiles which had touched or contained filings from some other nail whose claim was more ancient. Without conscious fraud on the part of anyone, it is very easy for imitations in this way to come in a very brief space of time to be reputed originals. It is not clear whether Jesus was crucified with three or with four nails, and the question has been long debated. The belief that three nails were used is called Triclavianism. The bridle and helmet of Constantine Sozomen and Theodoret reported that when Helena, the mother of Constantine the Great, discovered the True Cross in Jerusalem in the fourth century AD, the Holy Nails were recovered too. Helena left all but a few fragments of the cross in the Church of the Holy Sepulchre in Jerusalem, but returned with the nails to Constantinople. As Theodoret tells it in his Ecclesiastical History, chapter xvii: The fifth-century Church historian of Constantinople, Socrates of Constantinople, wrote in his Ecclesiastical History, which was finished shortly after 439, that after Constantine was proclaimed Caesar and then Emperor, he ordered that all honor be paid to his mother Helena, to make up for the neglect paid her by her former husband, Constantius Chlorus. After her conversion to Christianity, Constantine sent her on a quest to find the cross and nails used to crucify Jesus. A Jew called Judas (in later retellings further called Judas Cyriacus) led her to the place where they were buried. Several miracles were claimed to prove the authenticity of these items, and Helena returned with