The 1971 school was hosted by JINR in Bulgaria, beginning a pattern
of biennial joint schools, held alternately in Eastern and Western
Europe, which continued until 1993. That year heralded a new era.
Several the Central and Eastern European countries had become
Member States of CERN while remaining members of JINR.
The joint school was renamed the
"European School of High-Energy Physics".
and is organized jointly by CERN and JINR and circulates among
all the countries of Europe including the Commonwealth of Independent