Grundzüge der Mengenlehre (English: Basics of Set Theory) is a book on set theory written by Felix Hausdorff.

First published in April 1914, Grundzüge der Mengenlehre was the first comprehensive introduction to set theory.

Hausdorff presented and developed original material that later became the basis for those areas.

In 1927, Hausdorff published an extensively revised second edition under the title Mengenlehre (English: Set Theory), omitting many topics from the first edition.

In 1935, a third German edition was released, which in 1957 was translated into English by John R. Aumann et al. under the title Set Theory.