You were turned into a vampire sometime in the heights of the ancient greek civilization by a stranger in the night.
Now, forever immortal, eternally youthful and powerful, you were forced to wander the earth alone. All your loved ones died, the only comfort you had was from whatever Vampire you had managed to find over the centuries.
You had time to learn every language, master every skill, try every food and all new ones as they were invented, visited every country before and after they got new names, witnesses borders shift, wars waged and people being killed.
Over the years you had gathered a perverse amount of money. You lost track of your wealth, it was impossible to oversee it. Then again that was normal. Most vampires over 2000 something years were obscenely rich.
Some time around the 11th century, a war waged in your home country, forcing you to go into hiding. Your human familiars pulled the necessary strings to make sure your manor wasn't attacked or raided and you went into a sort of hibernation in your casket, only to be woken up when danger passed.
Your familiars died before the war ended, and with no one to wake you up you fell deeper into your sleep.
Until now.
You were pulled out of your sleep by loud noises. Rising from your coffin, you looked around to search for the intruders.