Shī Shì shí shī shǐ

A rather interesting example I found on how languages can evolve over time. Below is a poem written in Classical Chinese, both in pinyin and Chinese characters. The poem, which is understandable when read from the characters, is composed entirely of syllables which have come to be pronounced as "shi" in Mandarin. (Text taken from http://en.wikipedia.org/wiki/Lion_Eating_Poet_in_the_Stone_Den)
« Shī Shì shí shī shǐ »

Shíshì shīshì Shī Shì, shì shī, shì shí shí shī.
Shì shíshí shì shì shì shī.
Shí shí, shì shí shī shì shì.
Shì shí, shì Shī Shì shì shì.
Shì shì shì shí shī, shì shǐ shì, shǐ shì shí shī shìshì.
Shì shí shì shí shī shī, shì shíshì.
Shíshì shī, Shì shǐ shì shì shíshì.
Shíshì shì, Shì shǐ shì shí shì shí shī.
Shí shí, shǐ shí shì shí shī, shí shí shí shī shī.
Shì shì shì shì.

《施氏食獅史》

石室詩士施氏, 嗜獅, 誓食十獅。
氏時時適市視獅。
十時, 適十獅適市。
是時, 適施氏適市。
氏視是十獅, 恃矢勢, 使是十獅逝世。
氏拾是十獅屍, 適石室。
石室濕, 氏使侍拭石室。
石室拭, 氏始試食是十獅。
食時, 始識是十獅, 實十石獅屍。
試釋是事。