Depends on your definition of "seized power". In 34, he became the Fuhrer. In 33 he became the Chancellor of Germany, sharing power with the German President.
You want "Fuhrer", though. You take him, I don't want him.
When Hitler reached power in Germany, he baptized himself as the "fuhrer" which is a term that in German means "leader" or "guide". He considered himself the one to "guide" all Germans, the one who would lead the country towards the restoration of German pride after the humilliations suffered after WWI due to the Treaty of Versailles, and the one who would make Germany great again, both in terms of international influence and of territorial expansions.
