In Anderson's "House Rule" and A Midsummer Tempest, people from different histories converse in the Old Phoenix.
In Neil Gaiman's The Sandman: Worlds' End, people from different histories tell stories in the Inn of the Worlds' End. Thus, the Worlds' End sequences are both a framing device and an additional story.
In A Midsummer Tempest, the Old Phoenix is almost a framing device although it appears in the middle and at the end instead of at the beginning and the end.
Both series could have been extended indefinitely, the Old Phoenix as short stories, Worlds' End as very high quality monthly comic books, with some of the same historical characters visiting both.
Happy June.
