Known as "Der Klassiker" in Holland, this a bitter and often violent derby. Its a clash of cultures more than anything, Rotterdam is a huge port city with many thousands working on the docks. They seem to have a no-nonsense, working class attitude. Amsterdam is a more bohemian, vibrant and percieved by many Feyenoord fans as middle class.
Great clashes
Feyenoord fans remember fondly when they beat their fierce rivals 3-1 in the final of the Dutch Cup in 1980. This was the only time these two great clubs have ever met in a major final, and Petursson ensured that the trophy would be in the Rotterdam club's cabinet. Ajax fans, however, will point out this season's breathtaking 5-1 victory in Amsterdam, when Demy De Zeeuw grabbed two goals. Also, Ajax's 2006 victory in Rotterdam is a great memory for the Ajax faithful. They ran out 4-0 winners thanks to double's from Kenny Perez and Klaas-Jan Huntelaar.
Off the pitch
There has been a lot of violence and bitterness between both clubs but perhaps the most unforgettable was at a reserve match in 2004. Ajax fans stormed the pitch and attacked players and staff, Jorge Acuna, Feyenoord's winger, was attacked and consequently taken to hospital with head injuries. All this happened at a reserve match! In 1989, two nail bombs made by Feyenoord fans were used against Ajax supporters. This led to 14 people being injured, but luckily no deaths.
Some of the chants are unsavoury as well. Ajax are thought to be a jewish club by Feyenoord fans and Ajax have adopted this and refer to themselves as the "super jews", but Feyenoord sing "Hamas, Hamas, kill the jews", which is a reference to the Gaza conflict.
Who's top dog?
Well, between these two it has to be Ajax. They, guided by Johan Cruyff's brilliance, won the European cup three times in a row from 1971 to 1973. They have also won 29 Dutch league titles, 17 Dutch cups. They have been successful internationally and have won the European cup 4 times (which they have also won since it's been the Champions League in 1995), 1 UEFA Cup, 1 Cup Winners' Cup, 3 Super Cups and 2 World Club Cups.
Feyenoord also have a long and proud history. Domestically, they have won 14 league titles and 11 Dutch Cups. They have also been successful in Europe, becoming the first Dutch club ever to win the European Cup in 1970 when they beat Celtic in the final. They have also won the World Club Cup once in 1970. They have also won the UEFA Cup twice, and their second UEFA Cup final win over Borussia Dortmund was the last time a Dutch club won a European trophy.
In recent years, PSV have been the team to beat and both Ajax and Feyenoord have struggled to match the Eindhoven club. Ajax last won the league in 2004 whereas Feyenoord haven't won it since 1999.