Today’s Gospel recounts the origin of the expression “Doubting Thomas,” in which St. Thomas refuses to believe in the Resurrection until he has placed his finger into Christ’s nail wounds and his hand into Christ’s side (St. John 20:24-31).
Here’s a photo I took of the major relics housed in the Basilica of the Holy Cross in Jerusalem, which is actually located in Rome atop soil that St. Helen, mother of the Emperor Constantine, transported from Jerusalem. There are relics of the True Cross, etc., but I’m posting the photo because the relic in the upper left corner of this photo is of St. Thomas’ finger, the one he put in Our Lord’s wounds.
The relic is a finger bone encased in a reliquary shaped like a finger. The Young Fogeys blog has a better photo (http://youngfogeys.blogspot.com/2008/03/2nd-sunday-of-easter.html). The author of the linked article had the same bright idea I did — to post on St. Thomas’ finger for the Second Sunday of Easter, at the end of what Eastern Christians call Bright Week.