Nicodemus the Righteous, a secret disciple of Christ
Dates of commemoration
(Church calendar - Apr 17) Sunday of Myrrh-Bearing Women, righteous Joseph of Arimathea and Nicodemus (movable feast - celebration on the 3rd Sunday of Pascha)
(Church calendar - Aug 2) Uncovering of the relics
Life
Saint Nicodemus was a prominent Pharisee who believed in Christ. The Savior explained to him how man is regenerated through Baptism, but he did not understand how a man could be born again. When the Lord reproved him for his ignorance, he accepted it with humility (John 3:1-21).
Nicodemus came back to Christ from time to time, defended Him to the Pharisees (John 7:50-52), and brought spices to anoint His body (John 19:39). After being cast out of the synagogue for his belief in Christ, Saint Nicodemus went to live with Saint Gamaliel at his country house, remaining there until his death.
The relics of Saints Stephen, Gamaliel, Abibas, and Nicodemus were transferred from Jerusalem to Constantinople in 428 and placed in the church of the holy deacon Laurence (August 10).
Source:
https://oca.org/saints/lives/2017/08/02/102182-finding-of-the-relics-of-the-righteous-st-nicodemus
Holy relic type
unless specified otherwise below, "holy relic" means a fragment of a bone of the saint
1. Holy relic
2. Holy relic
Location of the holy relic in the Cathedral:
1. Icon "Entombment of Christ" on the Oblation Table, north side of the Altar
2. Relics cabinet in the Altar sacristy, reliquary #9