The International Biennale of Glass (IBG) is the largest and most professionally oriented event in Bulgaria devoted exclusively to glass art. It takes place every two years (2017, 2019, 2021), between September and October.

Guests of the event are international authors and lecturers who introduce the audience to the opportunities and achievements in this field of fine arts. IBG consists of exhibitions with selected works, educational lectures and various workshops in different locations of the country.

The IBG is under the patronage of the President of the Republic of Bulgaria.