See: European Subsidies Stray from the Farm (thanks to Martin Gervais for the link).
Here is an excerpt that I found especially interesting:
Overall the biggest slice of the farm subsidy cake still goes in direct payments for farmland. But even in this category there is controversy.
Providing the land is cared for and meets environmental standards, it does not need to be farmed to qualify for a subsidy. Mere ownership is enough, and therefore the wealthier the landowner, the larger the handout is likely to be.
The queen of England qualified for £473,500, or $778,812, in total farm aid in 2008 for Sandringham Farms in England, a 20,000-acre royal retreat that has been a private home to four generations of British monarchs since 1862. A pet project of Prince Charles to preserve the Transylvanian countryside also qualified for a nominal sum. Prince Albert II of Monaco collected €507,972 in 2008 for his wheat farms in France.
The duke of Westminster — the third richest person in Britain with a fortune estimated at £6.5 billion — collected £486,534 for his farm. Top Farms, the duke’s Polish distributor for his bull breeding company, Cogent, collected more than €8 million in subsidies from 2006 to 2007 for its dairy farms in Poland.