BIBLIOGRAPHY
Wikipedia「Maria Theresa thaler」
Wikipedia (according to the sources of each article)

Claims Supported by This Source
- After the Empress's death in 1780, all newly minted silver coins were dated 1780.
- Used in Saudi Arabia, Yemen, Oman, Ethiopia, Somalia, Kenya, and India.
- Ancestor of the Saudi Arabian riyal and the Ethiopian birr.
How to read the verification levels. 'Read' means the material was read in its entirety. 'Bibliography and abstract confirmed' means the bibliographic information and abstract were verified. 'Via course material' means the source was referenced through the main text of a book or a country's monetary history. The text hash is the SHA-256 of the main text from the original source page, excluding tags and whitespace, used to detect if the material has been altered.