- Baedeker[Baedeker 词源字典]
- "travel guide," 1863, from German printer and bookseller Karl Baedeker (1801-1859) whose popular travel guides began the custom of rating places with one to four stars. The Baedeker raids by the Luftwaffe in April and May 1942 targeted British cultural and historical sites.[Baedeker etymology, Baedeker origin, 英语词源]