But why did Anastasia died at a very early age? It was also said that after she died, Ivan became even more ruthless.
No one knows for sure what Anastasia died of. Some say she was poisoned and that her death was a murder...but nothing's certain on that issue. Ivan was mentally unstable because when the Tsar before him died, the boyars of Russia fought for the throne, murdering each other and things like that, all of which Ivan witnessed at a very young age. At 13, when Ivan didn't get his way, he sent his dogs out after the guy and watched him be ripped apart by the animals....I think Ivan had a sick love for crulety, which was caused by his witnessing the killings for the throne. When he married Anastasia Romanov, things did calm down. Ivan stopped murdering his people for no reason, he became a better ruler. After she died, he became infuriated, I think because he never knew why she died and he loved her very much.
Ivan went crazy after her death, tortured his prisoners and had a group of men wearing black and riding horses (I dont' remember what they were called) go out and search for people who were "disobeying the Tsar". If caught, people were tortured to death by hot iron or chains...something along those lines. I think this was called "The time of troubles"...I could have the wrong ruler...lol...anyway... Ivan became so angry at his son Ivan Ivanovich one day..I think it had something to do with him not liking Ivan's choice for a wife, and hit up on the head waith his staff. Ivan Ivanovich died because of that.
When he became elderly, Ivan called on a fortune teller of some kind to tell him when he would die. The fortune teller perdicted that he would die in March of 1584. Ivan died on the exact day the fortune teller had perdicted, while playing a chess game in the palace.