23 May – The 120-year-old Britannia Bridge built by Robert Stephenson across the Menai Strait is destroyed by fire.
twˈɛnti θɹˈiː mˈeɪ ðə wˈʌnhˈʌndɹɪd twˈɛntijˈɪɹˈoʊld bɹɪtˈæniə bɹˈɪdʒ bˈɪlt baɪ ɹˈɑːbɚt stˈɛfɛnsən əkɹˌɑːs ðə mˈɛnaɪ stɹˈeɪt ɪz dᵻstɹˈɔɪd baɪ fˈaɪɚ.