The "house" is the Union, the country, used metaphorically as in a family or clan.
The original quote is from the Gospel of St. Mark: "If a house is divided against itself, that house cannot stand." It was borrowed by Abraham Lincoln.
deductive
Lincoln owned a house in Springfield, Illinois, The house is not a national shrine, so to speak. He served in the US House of Representatives.
Abraham Lincoln President said a house divided against itself cannot stand.
A house. A house divided amongst itself can't stand
Abraham Lincoln
In 1858
the separation of the North and South of the U.S.
Lincoln in the Gettysburg Address.
June 16,1858:Lincoln delivered his A House Divided speech.
"A house divided against itself cannot stand"
What did the south do with all federal instillations after it seceded