Begnadeter Barde (Civ4 FFH)
This great person is gained through Great People points. This unit can be sacrificed (along with at least one other of a different type) for a Golden Age. It can be sacrificed to give (1000 research points (+2* the team's population)) * the game speed discover percentage towards a technology (or the minimum number needed, if that is less), to create a great work (4000 culture * the game speed's great work percent), or for a Great Bard Specialist. Note that all plots of this city that are within both the city's culture level and would be potentially worked by a sprawling city is set to a cultural value of (the cultural level of this city - the culture distance of this plot) * 20 + 1 + the city commerce rate. This can also be used to build Song of Autumn, in the appropriate holy city.