I have 2 large Artichokes, I mean LARGE! How long should I steam them for?!

I have 2 large Artichokes, I mean LARGE! How long should I steam them for?

Depends on whether you are steaming them in a traditional steamer (water at the bottom with artichokes suspended over it) or the way I learned, in a pot, starting with the water half way up the artichokes. Your flame should be turned down to medium-high AFTER the water starts to boil. Cover, and check the tenderness of the center with a fork after about 20 minutes or so. Some artichokes become tender extremely fast, while others can seem to take forever. You can also check by pulling out an INSIDE leaf. If it comes out easily, it should be done. Very large ones MIGHT take up to 40-45 minutes, but it is better to constantly check them than to over cook them.
Also, did you know that you can/should cook and eat the stem? After cutting it off, remove any dried up or discolored leaves. Remove any tough skin with a vegetable peeler or knife. Stand the stems up in the pot between the artichokes. Serve each one with a stem next to it. They are delicious and taste like the tender heart of the artichoke.
Be sure to add salt to your water. If you want a traditional Italian style; add minced fresh garlic, salt, black pepper and olive oil to your pot with the water. Make sure some of the garlic goes down into the leaves. Sprinkle on a small amount of grated Parmesan or Romano cheese. I like a bit of crushed red pepper added also. Always cook covered.