In Legacies S01E08 "Maybe I Should Start From The End", Hope mentions to Landon that she kissed a 90 year old vampire who tried to kill his mother but I don't remember such events from The Originals. So when did this happen and who was this guy?
His name was Roman Sienna. In The Originals S05E06, Roman is revealed to have kidnapped Hayley ultimately leading to her death later in the episode. This event takes place around 85 years after Klaus eviscerated his father and village in 1930's Germany making Roman around 90 years old.