The 12th EWBC will be held in Seville, Spain, from September 3rd to 6th, 2024. The Local Organizing Committee, working in concert with the ISC, is putting together a program that will try to cover the state of the art of cyanobacterial research. Additionally, we intend to arrange a workshop in which researchers will have plenty of opportunities to interact with each other. With these aims in mind, we cordially invite you to attend the workshop for a fruitful scientific experience and, hopefully, a splendid time in Seville.