In a small bowl, drizzle olive oil over medium heat. Add garlic and cook until golden, about 2 minutes. Pour into a small bowl and return pan to medium heat. Add the chicken, oregano, basil, garlic powder, marjoram, rosemary, salt, and pepper. Cook, stirring often, until chicken is golden and heated through. Remove any excess fat and refrigerate until ready to use.
Preheat oven to 500 degrees Dust a pan (or baker's peel if using a stonwith cornmeal.
On a lightly floured surface, roll pizza dough into a 14-16 inch circle. Poke in a few areas with a fork, cover, and let rise 20 minutes. Transfer dough to a prepared pan or baker's peel.
Brush the garlic olive oil over the crust. Add a layer of 2 cups mozzarella. Sprinkle with the chicken, feta, tomatoes, and spinach. Top with remaining mozzarella and a pinch of dried oregano, basil, and marjoram.
Bake in preheated oven until crust is golden and cheese is bubbly, 8-10 minutes.Let cool for about 5 minutes before slicing.