The leaders of the UK's national collections and major regional museums highlight the "enormous stress for colleagues at every level of an organisation" and "visitors who now no longer feel safe" following series of protester attacks on museum works

The artist was 'shocked and surprised' after 'Porcelain Cube' was destroyed by a man at Palazzo Fava in Bologna

Under the National Treasures scheme, 12 UK museums are mounting exhibitions around the loan of masterpieces from the National Gallery

Members of Riposte Alimentaire demand the right to "healthy and sustainable food" after splattering pumpkin soup over the protective glazing in front of the world's most-viewed painting

Velázquez masterpiece required 'conservation treatment to minor damage sustained to the painting surface, and the fitting of new glazing' following hammer attack on 6 November

Organisation pledges to back initiatives linking museums with local communities for anniversary project

This week's attack by climate protesters is the third time that the National Gallery masterpiece has been recruited to articulate contemporary social or cultural concerns

Two Just Stop Oil Activists targeted the work as a protest against new UK gas and oil licences, just over a century after the suffragette Mary Richardson attacked the same painting in 1914