Board Thread:Wiki-Related Questions and Answers/@comment-4975807-20130417180235/@comment-24863788-20141216020237

I think that we should create a page for the Lakeside Mansion, the Sorcerer's Mansion. A lot of important events happened there: the Sorcerer's Hat was used (unsuccesfully), the Arendelle portal was opened, the book writer was discovered (and this one heavily indicates that it will appear again in Season 4, since it is important for operation Mongoose).

As stated on an interview:

TVLINE |  I wanted to get some clarity about the lakeside mansion — it belongs to the Sorcerer…? HOROWITZ |  Well, it sure seems that way….