Alternate Haven Timeline
by David KnottHere is another idea for the timing of various events and adventures associated with both versions of the B3 module:
858 AC Haven is one of the founding Principalities of Glantri
ca. 860 AC A calamity causes the Palace of Princess Argenta to become "unstuck" in time and vanish into an Outer Plane where time passes much more slowly (perhaps one year per seven years on the Prime Plane). The Palace reappears on Mystara, sometimes at its original location but some- times at other locations, every 70 years (which equals about ten years for the Princess and her lover).
Shortly after the calamity Haven/Gullavia is overrun by Hulean bandits. The leader in charge of Gullavia makes peace with Glantri and pays a tribute of horses.
ca. 930 AC The first reappearance of the Palace at its original location. No adventurers find the Palace at this time, but Argenta's only daughter wanders outside the palace grounds just before the Palace disappears. Argenta is distraught, and in the process of searching for her missing daughter she and her lover are caught and tightly bound within the "heart of Arik".
The daughter of Argenta finds her way to the Abaddon Woods and is taken in by a local "wise woman". This young girl eventually grows up to become the new "Witch of Abaddon", as does her daughter. The second Witch of Abaddon has two daughters, one of whom is apparently stillborn in 972 AC and the other of whom survives and gives birth to D'hmis in 991 AC.
ca. 1000 AC The second appearance of the Palace near the Lake of Lost Dreams. The Immortal Thendara grabs the nearest party of adventurers and teleports them to the location, where they attempt the green cover version of the B3 adventure. If those adventurers are successful, Argenta and her lover are freed and they become rulers of the local area. The palace remains put from then on, and eventually they make contact with Duke/King Stefan and pay homage to him, in return for which Argenta is named "Baroness of Haven". If the adventurers fail (as they should be assumed to do if that adventure was not successfully carried out by the player characters in your campaign), then the Palace vanishes once again.
During WotI there are brief skirmishes between Glantrian and Hulean forces in the vicinity of Gullavia. The Baron of Gullavia provides early warning to the Glantrians of the approaching Hulean hordes and then cooperates with the Huleans when they arrive. After the war the Princes of Glantri recognise that he aided Glantri as much as he could and let the Baron retain power.
In the near future the Baron dies and is succeeded by his young son. The new baron is smitten with D'hmis, falls in love with her, and marries her. Unfortunately for him, D'hmis turns out to be an evil necromancer who uses her arts to murder him and take over as baroness. She then uses her evil arts to extend her life and youth -- see the movie "Death- stalker II" for an idea of the methods she uses, but not the reason for their necessity. Over the next several centuries she gradually draws her realm into closer relations with Glantri and is eventually awarded the title "Baroness of Gullavia" with the associated rights to vote in Parliament, but the title "Princess of Haven" continues to elude her because of her inability to extend her region of control beyond the immediate vicinity of Gullavia.
Assuming that Argenta is still trapped, adventurers in 1070 AC find the Palace in Ghyr in the far north of Mystara and free Argenta and her lover from the "heart of Arik" -- but before they can do more than that the Palace disappears again, and Argenta and her lover are lost with the Palace.
Subsequent appearances of the Palace in 1140, 1210, and 1280 are in a variety of places. At some point after the appearance in 1280 AC, Argenta and her lover die. When the Palace reappears in 1350, it is haunted by Argenta and remains in place from then on. The orange cover version of B3 may be attempted ca. 1360 AC. Alternatively, if you decide that the 500 year reference is not to be taken literally, then Argenta could die at any point after 1070 AC and that the Palace comes to rest in its original location at its next appearance.