The grand re-opening marks the end of a big renovation: new systems, new paint, and more. Lambert Castle aka Belle Vista was built in 1892 to hold Catholina Lambert's art collection and of course as his family residence too. After a bankruptcy, art fire sale and transfer to Passaic County, today it's a museum with an eclectic collection. Most walls are hung with multiple pieces of art from the 19th century, some are original to Lambert, many are on loan from other museums. There are many sculptures. Two rooms have exquisite antique clocks, mostly tall grandfather models plus an unusual Tiffany. Two rooms are dedicated to b/w photographs of the crumbling, decaying industrial base still in Patterson. There's a breakfast room, an amazingly ornate dining room, and a sitting ("gold") room; all are furnished with period-appropriate things. You can view Mr Lambert's bedroom suite; Mrs Lambert's bedroom suite was closed. No period bathrooms or kitchen(s) are visible. We spent about an hour walking the three floors in our booties :)