1. Heat olive oil in a large Dutch oven over medium-high heat. Add chicken thighs to pan; sauté 4 minutes on each side or until browned. Add 3 cups water, onion, and next 7 ingredients (through garlic) to pan; bring to a boil. Reduce heat, and simmer 25 minutes.
2. Combine remaining 4 cups water and 1/4 cup juice. Cut off stem of each artichoke to within 1 inch of base; peel stem. Remove bottom leaves and tough outer leaves, leaving tender heart and bottom. Cut each artichoke in half lengthwise; place in lemon water.
3. Drain artichokes; pat dry. Add artichokes, remaining 6 tablespoons juice, and rind to chicken mixture. Cover and cook 20 minutes or until artichokes are tender. Remove chicken and artichokes with a slotted spoon.
4. Bring liquid to a boil; cook, uncovered, until reduced by half (about 15 minutes). Return chicken and artichokes to pan, and stir in kalamata olives. Reduce heat, and simmer 3 minutes or until thoroughly heated. Garnish with cilantro sprigs, if desired. Serve with couscous.