Palace of Herod the Great
Bulgakov's notes show that he took the architectural details from Farrar's Life of Jesus Christ. The palace was located at the Western side of the city walls. You can see it on the maps of ancient Jerusalem.
Herod I the Great
(b. ca. 73 BC) was the King of Judea 37-4 BC and an ally of the Romans.
He rebuilt the temple, but was disliked by the principal factions among
the Jews. According to the New Testament, he ordered the murder of all Jewish
children when he heard of the birth of Christ.