Hazelnut Baklava

Hazelnut Baklava

1 box store bought thin phllyo dough (every brand has different number of sheets in box. As long as you have ~20 sheets, it fine)
2 1/3 sticks of butter
3 cups of walnut, chopped (not coarse and not minced)

for the syrup
3 cups of water
3 cups of sugar (if you like it really sweet go for 3 and a half cup)
2 tbsp lemon juice (to prevent crystallization of sugar)