- Maastricht, Netherlands 1, 2
- McCaul, Padraig 1
- Madara, Bulgaria 1
- Madeira, Portugal 1, 2, 3, 4
- Madrid, Spain 1, 2, 3, 4
- Mafia 1, 2, 3
- magic 1, 2, 3
- Maginot Line 1, 2
- Mahler, Gustav 1, 2
- Mainz, Germany 1, 2, 3, 4
- Majorca, Spain 922, 1, 2
- Malta 1, 2, 3
- Man, Isle of 1, 2
- Manchester, England 1
- Mann, Thomas 1, 2, 3, 4, 5
- Mariánské Lázně, Czech Republic 1
- Marie, Queen of Romania 1
- Maria Theresa, Empress 1, 2
- Marienbad (Mariánské Lázně) 1
- Marseille, France 1, 2
- Marx, Karl 1, 2, 3
- Mary, Blessed Virgin 1, 2, 3, 4
- Mary of Teck, Queen of Great Britain 1
- Masham, England; Druids’ Temple 1
- Mäuseturm (Mice Tower), Rhine 1
- maze-games 1
- Mecklenburg, Germany 1, 2
- Medici family 1
- Medjugorje, Bosnia 1
- megalithic religion 1, 2, 3, 4, 5
- Metternich, Prince Clemens 1, 2
- Michelangelo 1, 2
- Milan, Italy 1, 2, 3, 4
- Mindszenty, Cardinal Jozséf 1
- minority groups, ethnic 1
- minority nations 1
- Mitford, Nancy 1
- Mölln, Germany 1, 2
- Monaco 1, 2, 3
- monks 1, 2
- Montenegro 1, 2
- Montgomery, Field Marshal Sir Bernard Law 1, 2
- Morris, Twm 1
- Moryson, Fynes 1
- Mosey, Don 1
- Mostar, Bosnia 1, 2, 3, 4
- mother, JM’s 1, 2
- motorways 1
- Mozart, Wolfgang Amadeus 1, 2, 3
- Munich, Germany 1
- music 1, 2, 3, 4, 5;
- and religion 1, 2;
- see also anthems and individual composers
- Mussolini, Benito 1, 2, 3, 4, 5, 6
- Mynydd Carn, Wales 1