So by the time "Fantastic Beasts" takes place, Grindelwald is in his 40s and his power is on the rise. But he never became a significant part of British magical history, so his activities must have been mostly confined to Eastern and Central Europe.
Fantastic Beasts and Where to Find Them is set in 1926 and its sequel, Fantastic Beasts: The Crimes of Grindelwald, in 1927. This indicates Grindelwald was 44 and 45 years old, respectively, during the events of both films.
Dumbledore was approximately two years older than Grindelwald when the two young men met. Grindelwald was expelled from Durmstrang Institute and then became friends with Dumbledore following that. It was during that time that Albus had become influenced and swayed by Grindelwald's charm.
He might still be controlling much of the world if it weren't for his greatest weakness -- his feelings for Dumbledore. Not only is Grindelwald more powerful than Voldemort, but he's also a more compelling villain, which is why audiences will be seeing more of him in Fantastic Beasts 3.
Book 1 - The Prince of Slytherin
Grindelwald is mentioned by Ron Weasley, who erroneously states he was sorted into Slytherin House at Hogwarts.
He's twins in one body. So a gamey eye is more like the other side of him. Sort of like a brain for each eye, an albino twin, and he's somewhere in the middle. Per his interview with Entertainment Weekly, it looks like Johnny Depp has taken his role as Grindelwald quite acutely with this character detail.
It's difficult to find out anything about Grindelwald, as there is very little information about Gellert Grindelwald's past. However, by some evidence, it can well be concluded that he was in-fact a pure blood.
Dumbledore learned Parseltongue from his ex-partner, Gellert Grindelwald. Dumbledore learned Parseltongue to better understand Voldemort.
If he had gone to Hogwarts, he would be in Slytherin.
And talking about the visit, Voldemort visited Grindelwald only to kill him. Because according to his knowledge, the wand still owed its allegiance to Grindelwald. Firstly, even if we assume that Voldemort knew the whereabouts of the wand, he still needed to kill Grindelwald to "own" it.
For the Greater Good. Gellert Grindelwald's slogan. Gellert Grindelwald (1883-1998) was considered to be one of the most powerful Dark Wizards of all time, second only to Tom Marvolo Riddle, who later became known as Lord Voldemort. He was schooled at Durmstrang Institute until his expulsion.
Therefore, the conclusion is that McGonagall worked at the Ministry of Magic for two years, from the autumn in which she turned 19 to the summer before she turned 21.
As a revolutionary operating outside the law, Gellert Grindelwald was man who lived in service to his ideals and, as he saw it, in humanity.
Voldemort goes to Grindelwald's cell in Nurmengard prison, to find out what Grindelwald knows about the Elder Wand. Voldemort then kills Grindelwald. Yes, in book 7. Voldemort was after the Elder Wand and he believed Grindelwald had it.
"I wish you were working with me now. Towards a world where we wizards are free to live openly, and to love freely,"
Harry is the magical Heir of Gryffindor (and he's also a descendent of Godric), Neville of Hufflepuff, Hermione of Slytherin and Luna of Ravenclaw.
It's a rare skill
The language is incredibly rare, as Harry is told countless times. The only place it isn't rare is within the bloodline of Salazar Slytherin himself – and as such, is usually hereditary.
Through his mother's family, he is the last descendant of the wizard Salazar Slytherin, one of the four founders of Hogwarts School of Witchcraft and Wizardry.
Stranger still, the Elder Wand's core substance is Thestral hair. There are no Ollivander notes to go by – it wasn't a material he chose to work with – but we do know that Thestrals have a strong connection with death, plus the magical properties of invisibility, flight and an uncanny ability to find their destination.
We know that Dumbledore is around 46 years old in Crimes of Grindelwald as Pottermore lists his birth year as 1881 and Crimes takes place just a few months after the December 1926 events of Fantastic Beasts and Where to Find Them.
Speaking on the Distinctly Dumbledore feature on The Crimes of Grindelwald Blu-ray, Rowling confirmed Dumbledore and Grindelwald's relationship was passionate: “Their relationship was incredibly intense. It was passionate, and it was a love relationship.
Grindelwald believed that wizards of any blood status were greater than muggles and deserved to rule over them, unlike Voldemort who believed that muggle-borns were inferior beings just for having muggle parents, despite muggle-borns still being wizards.
Why didn't the Potters make the Sacred Twenty-Eight? Potter is a common Muggle surname. Harry's family didn't make the list, according to J.K. Rowling, because 'the anonymous compiler of that supposedly definitive list of pure-bloods suspected that they had sprung from what he considered to be tainted blood'.