The Linux Kongress was an annual conference of Linux developers from around the world, that took place every year from 1994 to 2010. It started as a two-day conference in 1994, when Linux was in the early stages of development, and by 2003 had become a four-day event. It occurred every year in Germany except 2001 and 2007. During its lifespan, Linux-Kongress was one of the three major international grass-roots Linux and Open Source conferences in the world, along with linux.conf.au and Ottawa Linux Symposium.