Spermatogenesis is the process of forming sperm cells by meiosis (in animals, by mitosis in plants) in specialized organs known as gonads (in males these are termed testes). After division the cells undergo differentiation to become sperm cells.
The Dracula of fiction lived in a place that was based on Bran Castle in Transylvania. Bram Stoker never visited Romania. He depicted the imaginary Dracula's castle based upon a description of Bran Castle that was available to him in turn-of-the-century Britain.
Castle Volkihar has been occupied by vampire's for centuries. Prior to Harkon taking over the castle, his brother Brunar was the head of the coven. Harkon raised an army and finally after a decade of fighting stormed the castle and locked his brother and his coven away in the family tombs.