In a large bowl, mix together the warm water and the starter. Once combined, add the flour and salt. Mix until a dough forms. It will look shaggy and that is ok. Cover with a damp towel and let it rest for 1 hour.
After 1 hour, add the cinnamon, sugar, and raisins. Fold the dough onto itself until the raisins and cinnamon are combined into the dough.
Cover with a damp towel and let it rise for 8-10 hours or until it has doubles in size and looks light and bubbly.
After 8-10 hours, turn the dough onto a lightly floured surface. Shape the dough into a ball by folding the edges into the middle and then flipping the dough over at the end.
Place the dough in a kitchen towel lined bowl sprinkled with flour, seam side up. Cover with a damp kitchen towel and place it in the refrigerator overnight.
In the morning, preheat the oven to 450 degrees. Take the dough out of the bowl and place it seam side down onto a piece of parchment paper. Make a slice on the top of the dough and place it in a Dutch oven.
Bake for 20 minutes covered, and then 35 minutes uncovered. Take the bread out of the oven and let it cool completely before serving.