In the Ultima series, Lord British rules from his throne inside Castle Britannia, and continuously provides healing, resurrection and other miscellaneous help for the Avatar (the main character) and his adventuring party.
Throughout the Ultima series, Lord British never leaves his castle, except for Ultima V, where his absence constitutes the main storyline, and at the end of Ultima VI, when he uses a red moongate to travel to the Isle of the Avatar.