Surnames of French engineers Jacques Triger, Henri Giffard, mathematician Francois Perrier and Charles-Francois Sturm in Paris.
- Package: Cities of the world. Paris
- Categories: Arts, Culture & Entertainment
- Location: Paris, France
- Event date: 17.07.2016
- Date published: 17.07.2016
- Author: Natalia Seliverstova
- Credit: Sputnik
- Source: Sputnik
- Original: Digital
- Media: JPEG, 3150x2102px, 2Mb