Polonia sive de situ, populis, moribus, magistratibus et Republica regni Polonici libri duo

Polonia sive de situ, populis, moribus, magistratibus et Republica regni Polonici libri duo is a book, first published in Cologne in 1577 in Latin. The author of the book is Marcin Kromer.

Title can be translated into English as "Poland, about location, culture and offices of Polish Republic". First Polish translation was made in 1853 ("Polska, czyli o położeniu, obyczajach, urzędach Rzeczypospolitej Królestwa Polskiego").

The book describes the country of Poland in late XVI century (known at that time as the Polish-Lithuanian Commonwealth).

There have been several editions of this book with varying contents. Main chapters include:

* I. Borders of Poland
* II. The shape of surface
* III. Mineral resources
* IV. Hydrography
* V. Climate, flora, fauna
* VI. Towns and villages

Some editions were accompanied by with maps (drawn by Marcin Kromer himself) of:
* Rivers of Poland
* Cities of Poland
* Province of Warmia