The E! network, which runs the Keeping Up With the Kardashians TV series, confirmed the news.

The rapper and reality TV star were joined by several hundred guests at the 16th-century Fort Belvedere.

It is the first marriage for West, and the third for Kardashian.

The rapper proposed to his wife in October on her birthday.

12 Years a Slave director Steve McQueen and Will Smith's son Jaden were among the celebrities spotted in Florence.

Earlier, the couple had arrived there by private jet after holding a series of parties in Paris.

They'd spent Friday night celebrating at Versailles.

West, 36, and Kardashian, 33, held a private costume party at the chateau after they were told they would not be able to marry there in January.

The celebrations included horses adorned with bright colours, riders wearing huge feathers in their hats, musketeers in wigs and drum rolls.

It's thought the wedding could earn the couple up to $21 million (£12.5m) thanks to sponsors and through the sale of exclusive photos of the ceremony.

The money will help repay the hire of Fort Belvedere, a Renaissance fortress which overlooks Florence and which is costing more than $400,000 (£237,000) for the day.

Earlier on Friday, the couple had lunch in the Chateau de Wideville west of Paris, which is owned by designer Valentino.

On Thursday night, Kim Kardashian celebrated her hen do with friends in Paris sporting a white Pierre Balmain mini-dress embellished with pearls.

The Keeping Up with the Kardashians star tweeted several photos of herself in the city, including one with the Eiffel Tower lit up behind her and her friends with the message: "Night out in Paireeeeee."

One showed her with her grandmother while yet another of her and her friends bore the message "I'm so lucky! I have the best friends in the whole wide world."

Kanye West proposed to Kim Kardashian on her 33rd birthday in October last year at San Francisco baseball ground AT&T Park.

The couple's first child, a daughter named North, was born in June 2013.

Kardashian was previously married to music producer Damon Thomas from 2000 to 2003 and spent 72 days married to professional basketball player Kris Humphries in 2011.

Their ceremony was broadcast as a two-part TV special called Kim's Fairytale Wedding.