Wikipedia:WikiProject History/CategoryExample

                                            History
                                              |
                                    .---------+------------------.
                                    |                            |
                            History by nation             History by period
                                    |                            |
                         .----------+-----------+    .--.        |
                         |                      |    |  |        |
                   United Kingdom   Republic of Ireland |  Ancient history
                     |  |  |  |                 |       |        |
  .----------+-------+  |  |  `------------+----+       |        |
  |          |       |  |  |               |            |   .----+-----.
  |    Great Britain |  |  `-------.    Ireland <-------'   |          |
  |          |       |  `------.   |       |                |          |
  +----------+-------+---.     |   `----+--'                |    Ancient Rome
  |          |           |     |        |                   |          |
  |       England     Scotland |   Northern Ireland         |          |
  |          |                 |                            |          |
  `-+--------'                 `-----------+----------------+--.       |
    |                                      |                   |       |
  Wales                              Ancient Britain         Roman Britain