First Founders' Party is an event that was held in the original Lockwood Mansion at September 24, 1864. The next founders' party that was seen in 2009.
Henry told Katherine that an unknown supernatural creature killed someone, but he was sure that vampires didn't have any part in it. He wanted to tell other vampires in town to leave it, but Katherine calmed him.
Then Katherine told George that she's a vampire and that she knows that he's a werewolf. Later, Stefan confessed his love and kissed Katherine even though he wasn't compelled. She refused Damon after that and was happy about the kiss.
- This event happened in Season Two episode Memory Lane (in a flashback).
- Some of the attendees are named after famous people such as Elizabeth Taylor (Oscar winning actress) and Lucille Moore (One of the first woman science fiction and fantasy writers).
- The last name Martin appears on the attendee list, whether there is a connection to the Martin witches of Season Two and these unseen attendees is unknown, unlikely but possible.