“They took Jesus

To the high priest.

All the chief priests,

The elders,

And the Scribes

Were assembled.”

Καὶ ἀπήγαγον τὸν Ἰησοῦν πρὸς τὸν ἀρχιερέα, καὶ συνέρχονται πάντες οἱ ἀρχιερεῖς καὶ οἱ πρεσβύτεροι καὶ οἱ γραμματεῖς

This is similar to Matthew, chapter 26:57, but there is no mention of the house of Caiaphas here as there was in Matthew.  In Luke, chapter 22:54, Jesus was simply brought to the high priest’s house, which would have been Caiaphas.  In John, chapter 18:13-14, they brought Jesus to the house of the father-in-law of Caiaphas, Annas, who had been the high priest of Jerusalem from 6-15 CE, before he was removed by the Romans at the age of 36, even though he lived to the age of 61.  Thus, he had a lot of influence on things.  John remarked that Caiaphas had said it was better for one person to die for the people.  Caiaphas was the high priest from 18-36 CE since he had married the daughter of Annas.  Mark simply said that they took Jesus to the high priest (Καὶ ἀπήγαγον τὸν Ἰησοῦν πρὸς τὸν ἀρχιερέα), without mentioning his name or saying it was his house.  Apparently, the chief priests (οἱ ἀρχιερεῖς), the elder presbyters (καὶ οἱ πρεσβύτεροι), and the Scribes (καὶ οἱ γραμματεῖς) had all gathered or assembled there (καὶ συνέρχονται πάντες).  Was this an official meeting of the Jerusalem Sanhedrin?  Probably not, because these official meetings could not be held during the festival days or during the Passover.  On the other hand, some kind of informal meeting was possible.  However, there was no mention of any Pharisees or Sadducees being there either.