Today, CERN welcomes Serbia as its 23rd Member State, following receipt of formal notification from UNESCO that Serbia has acceded to the CERN Convention

Today, the Director-General of CERN, Fabiola Gianotti, and the Minister of Science and Education of the Republic of Croatia, Blaženka Divjak, signed an Agreement admitting Croatia as an Associate Member of CERN.

CERN has been officially notified that Lithuania's internal procedures have been approved, following the Agreement signed in June 2017

On 4 July 2017, the Republic of Slovenia became an Associate Member State of CERN in pre-stage to Membership

Official notification that India has ratified the Association Agreement with CERN today

On 5 October 2016, Ukraine became an associate member State of CERN after the ratification by its Parliament of the agreement

A ceremony was held for the raising of the Romanian flag alongside the flags of CERN’s 21 other Member States

A ceremony was held for the raising of the Romanian flag alongside the flags of CERN’s 21 other Member States

As Romania has now become a Member State of CERN, Romanian scientists share their thoughts about this new era of partnership for their community

On 17 July 2016, Romania became the twenty-second Member State of CERN