What was the largest empire in eastern europe in 1900

Austria-Hungary

Explanation:

Austria-Hungary was a large empire in Central and Eastern Europe. It was formed in 1867 and lasted until 1918. The empire was the largest one in Eastern Europe in 1900, and one of Europe's major powers at the time. The empire dissolved into several new states at the end of the First World War. It was ruled by the House of Habsburg.

i would go with the last one

thing is, i'm afraid, you can't.

the most you can do is log out and never log in again.