In Boyne's The Boy in the Striped Pajamas, what did Bruno's old house in Berlin look like?

Bruno's
old home in Berlin is a large, ornate
home, which has massive oak doors, a grand staircase, and
plenty of nooks and
crannies that Bruno can explore. Bruno mentions that his home is four floors

with a basement, where the family's cook and servants live. The ground floor of Bruno's
Berlin
home includes a kitchen, a large dining room, and his father's office,
which Bruno is prohibited
from entering unless he is given special
permission. There are two bedrooms on the second floor,
which belong to Bruno
and Gretel, and there is a master bedroom with a bathroom on the third
floor.
On the fourth floor, there is a small room with slanted windows that overlooks
Berlin.
Bruno's favorite thing about his home in Berlin is the massive
banister that runs from the
fourth floor to the ground level. Bruno's
favorite pastimes are sliding down the massive
banister and exploring the
numerous nooks and crannies throughout the massive home.
Unfortunately,
Bruno's father is promoted to Commandant and...