Rinse chicken inside and out, then pat dry with a paper towel.
Cut orange in half. Rub the chicken with one half of the orange.
On a large plate, mix together garlic and paprika, then roll the chicken in the mixture.
Slice the remaining half orange and stuff inside chicken along with rosemary. Place chicken on a rack in a roasting pan or on a chicken stand sitting in a baking dish.
Place chicken, uncovered, into oven. Bake for 15 minutes, then reduce temperature to 350°F. Total baking time should be approximately 20 minutes per pound of chicken, or until juices run clear.
Remove chicken from oven and let stand for 10 minutes before cutting it.