Heat the oven to 400 F. In a bowl, combine the breadcrumbs and olive oil. Toss to coat. Spread the crumbs in a shallow baking pan and bake, stirring once halfway through, until the crumbs are lightly golden, about 10 minutes. Set aside to cool.
Working with 1 artichoke at a time, snap off any tough outer leaves and trim the stem flush with the base. Cut off the top third of the leaves with a serrated knife, and trim off any remaining thorns with scissors. Rub the cut edges with a lemon half to prevent discoloration. Separate the inner leaves and pull out the small leaves from the center. Using a melon baller or spoon, scoop out the fuzzy choke, then squeeze some lemon juice into the cavity. Trim the remaining artichokes in the same manner.
In a large bowl, toss the breadcrumbs with the Parmesan, garlic, parsley, lemon zest and pepper. Add the 2 to 4 tablespoons stock, 1 tablespoon at a time, using just enough for the stuffing to begin to stick together in small clumps.
Using 2/3 of the stuffing, mound it slightly in the center of the artichokes. Then, starting at the bottom, spread the leaves open and spoon a rounded teaspoon of stuffing near the base of each leaf. (The artichokes can be prepared to this point several hours ahead and kept refrigerated.)
In a Dutch oven with a tightfitting lid, combine the 1 cup stock, wine, shallot and oregano. (Note: Don't use cast iron or the cooked artichokes will turn brown.) Bring to a boil, then reduce the heat to low. Arrange the artichokes, stem-end down, in the liquid in a single layer. Cover and simmer until the outer leaves are tender, about 45 minutes (add water if necessary). Transfer the artichokes to a rack and let cool slightly. Cut each artichoke into quarters and serve warm.