Medicine is founded 1930 in Wales - The first youth hostel opens at Pennant Hall in the Conwy Valley 1920s 1929 in Wales - Megan Lloyd George becomes Wales's first female MP 1928 in Wales - Amelia Earhart lands in Wales after flying the Atlantic 1927 in Wales - Coleg Harlech is founded 1926 in Wales - Miners' strike leads to General Strike 1925 in Wales - Llyn Eigiau dam bursts, killing 16 people 1924 in Wales - Claude Friese-Greene travels through Wales 1923 in Wales - The Diocese of Swansea and Brecon is created 1922 in Wales - Urdd Gobaith Cymru is founded 1921 in Wales - The UK's first oil refinery opens at Llandarcy 1920 in Wales - Death of Sir Owen Morgan Edwards 1910s 1919 in Wales - Kinmel Park Riots 1918 in Wales - First woman parliamentary candidate in Wales 1917 in Wales - Death of Hedd Wyn 1916 in Wales - 38th (Welsh) Division in action at Mametz Wood 1915 in Wales - Publication of My People by Caradoc Evans 1914 in Wales - Welsh Home Rule Bill fails 1913 in Wales - 439 men killed at Senghenydd in the worst disaster in British mining history 1912 in Wales - National miners' strike 1911 in Wales - Investiture of the future Edward VIII of the United Kingdom as Prince of Wales 1910 in Wales - First general election in which all Welsh constituencies are contested 1900s 1909 in Wales - Record British monthly rainfall of 56.5 inches at Llyn Llydaw, Snowdonia 1908 in Wales - Strumble Head lighthouse built 1907 in Wales - King Edward VII lays foundation of Bangor University 1906 in Wales - no Conservative MPs in Wales 1905 in Wales - David Lloyd George joins the Cabinet 1904 in Wales - start of 1904-1905 Welsh Revival 1903 in Wales - Death of Dr Joseph Parry 1902 in Wales - Opening of Great Orme tramway 1901 in Wales - Prince George and Princess Mary become Prince and Princess of Wales 1900 in Wales - Keir Hardie becomes first Labour MP 1890s 1899 in Wales - First gramophone recording in the Welsh language 1898 in Wales - Peak year of slate production in Wales 1897 in Wales - Marconi makes the first radio transmission from Lavernock Point 1896 in Wales - Opening of the Snowdon Mountain Railway 1895 in Wales - Welsh Grand National