In a large skillet over medium heat, melt butter and sauté onion and celery until tender (~10 minutes).
Place bread cubes in a large bowl; add onion mixture, salt, pepper, parsley, sage, rosemary and thyme.
Add broth; gently toss until all cubes are moist.
Place mixture in a casserole dish; distribute 6 pats of butter on top.
Bake covered 35 minutes; uncover and bake 10 minutes more.