The database is called ATLAS and provides information and images of over 22,000 items. It is easy to use, and provides dates, important information and supplementary information on most works. It even offers the items location in the museum. The images are great and can be enlarged for viewing details. There are alternative views of items, including specific close ups. It is great if you are researching, planning a trip, looking for inspiration or just love art!
Check out ATLAS here.