Pour the apple cider into a large pot and set over medium-high heat. Dice up the apples and toss them into the cider. Peel the rind off the orange in large pieces and toss that in too. Add the cranberries, allspice berries and cinnamon sticks. Add the sugar and stir it around to dissolve. Bring the mixture to a low boil, then reduce the heat to low and simmer for 45 minutes to 1 hour.
Add the brandy, then simmer for another 10 to 15 minutes. Serve warm.