throw open

throw open (third-person singular simple present throws open, present participle throwing open, simple past threw open, past participle thrown open)

1. To open to visitors
   • September 8 2022, Stephen Bates, “Queen Elizabeth II obituary”, in The Guardian‎:

     the walkabouts that increasingly characterised royal appearances, the pop concerts at Buckingham Palace, the throwing open of the royal palaces to visitors – even the paying of income tax, and royal podcasts – would have been inconceivable as innovations at the time Elizabeth came to the throne.