The new complex has been part of the Smithsonian's plans since the original museum opened almost 30 years ago, officials say.
A highly original museum of Victorian family and commercial life.
In 1949, Anna greatly expanded the original museum with the addition of two wings given as a memorial to her late husband.
The original museum was closed in 2009 since it no longer met public safety standards.
It is nearly 10 times the size of the original museum.
This significant collection was on display at the original museum until the mid-1990s.
It is very fortunate to still contain so many of the original museum quality pieces to grace the mansion.
"There was the overwhelming success of the original museum, so it was not hard to convince people that we had a need."
The original museum was established almost 100 years ago.
The original museum only accommodated 4 percent of the museum's collection.