Combine in a saucepan:
Bring to a simmer, reduce the heat to low, and simmer, covered, for 30 minutes. Ladle into warmed mugs, placing a cinnamon stick or a strip of orange zest in each one. If desired, add to each serving:
To make Vin Brûlé, a French variation, bring the same ingredients to a boil, covered, over high heat. Remove from the heat, uncover, and carefully ignite with a long match. When the flames have died, ladle the wine into warmed mugs, garnishing them as above.