What castle/palace did Catherine de Medici rule from? I could not find this information in the Wikipedia article, maybe I overlooked it.

Thank you! :-)

Catherine de Medici lived in several large houses, palaces, and Chateaus. This article details them.

http://en.wikipedia.org/wiki/Catherine_de'_Medici's_building_projects

I see many of the architectural projects... but I can't find where she actually lived.

She lived in several of these "projects." At one time she kept her household in the Louvre Palace, but apparently she was living in another nearby palace. Start reading carefully the Montceaux section -- and keep going.

You're very welcome. :-)

To determine the castle or palace that Catherine de Medici ruled from, there are a few steps you can take:

1. Start by searching for reliable historical sources outside of Wikipedia. While Wikipedia is a good starting point, it may not always provide all the information you need.
2. Look for biographies or historical accounts of Catherine de Medici. Books and articles specifically related to her life and reign can often provide more detailed information than general sources.
3. Focus your search on the period when Catherine de Medici was in power, specifically during her time as Queen Consort of France (1547-1559) and later as Queen Mother (1559-1589). Pay attention to her residences during these periods.
4. Consider the major castles and palaces associated with French royalty during this time. Some prominent candidates to investigate include the Château de Blois, Château de Chenonceau, and Château de Fontainebleau. These castles were known to have been inhabited by Catherine de Medici at various points in her life.
5. Collect and analyze the information from your research to identify the castle or palace where Catherine de Medici ruled from.

Remember, historical figures often had multiple residences depending on the time period and specific events occurring during their reign. Therefore, it is possible that Catherine de Medici ruled from different castles or palaces throughout her life.