Some calendar feasts are called the “Translation of the Relics” of a particular saint. The word ‘translation’ means, the removal of the remains of a saint from one place, for example, his or her tomb, usually in a reliquary or container for holy relics, to another place, like an important church or cathedral.  In this case, St. Ignatius, Martyr, holy relics were transferred to Rome, as you read below.

“After the holy Hieromartyr Ignatius, the Godbearer and Biship of Antioch, was thrown to the lions in the year 107 on the orders of the emperor Trajan, Christians gathered up his bones and preserved them at Rome.

Later, in the year 108, the saint’s relics were collected and buried outside the gate of Daphne at Antioch. A second transfer, to the city of Antioch itself, took place in the year 438. After the capture of Antioch by the Persians, the relics of the Hieromartyr Ignatius were returned to Rome and placed into the church of the holy Hieromartyr Clement in the year 540 (in 637, according to other sources).

Saint Ignatius introduced antiphonal singing into Church services. He has left us seven archpastoral epistles in which he provided instructions on faith, love and good works. He also urged his flock to preserve the unity of the faith and to beware of heretics. He encouraged people to honor and obey their bishops, “We should regard the bishop as we would the Lord Himself.” (To the Ephesians 6)

In his Letter to Polycarp, Saint Ignatius writes: “Listen to the bishop, if you want God to listen to you… let your baptism be your shield, your faith a helmet, your charity a spear, your patience, like full armor.” From Orthodox Church of America: https://www.oca.org/saints/lives/2000/01/29/100335-translation-of-the-relics-of-the-hieromartyr-ignatius-the-godbea