It was a kept a secret because it was a meeting to discuss what they were going to do to the Jews and the " The Final Solution " was a code name for the extermination of the Jews
They knew they were the first to learn how to work iron and kept it secret.
That was standard practice and it still is. All secret and classified military information is kept secret to protect the forces and the efforts to defeat the enemy.
Ordinary concentration camps were not secret. Only the small number of extermination camps were secret.
Roman engineering did not have any secret weapons. None of the Roman engineering achievements were kept secret.
Theresienstadt Ghetto was in the Protectorate of Bohemia and Moravia, now Czech Republic, not in Poland (wrong category). The area was less than 0.2 square km.
President Wilson had a stroke. It was kept a secret.
They aren’t kept secret.
Theresienstadt - film - was created in 1944.
The duration of Theresienstadt - film - is 1.5 hours.
Silk was kept secret b/c of its value
Secrets should be kept secret because if they were not, everyone would know it. If everyone knew your secret, then you probably wouldn't be too happy. And a secret would not be secret then.
Best Kept Secret - song - was created on 2010-09-03.
A best-kept secret is a significant fact or characteristic about something or someone which is not particularly well-known.
The Best Kept Secret - Alphrisk album - was created in 2004-10.
Theresienstadt - 1944 is rated/received certificates of: Portugal:(Banned) (original rating)
Nobody knows. It's a secret.
In the kitchen...