Leader of Liverpool council Mike Storey said: "The Biennial once again exceeded with the quality of its art, across the city and beyond. It has caused debate and was thought provoking.
"I am particularly happy that several of the Capital of Culture Creative Community projects have taken place in the city."
Yoko Ono's piece, My Mummy Was Beautiful, caused the most debate.
Pictures of breasts and pubic hair were put on banners across the city centre leading to a wave of complaints from the public, councillors and public decency campaigners.
The Biennial also saw the birth of Liverpool's Arts District.
Littlewoods heir James Moores put up the cash to enable the two warehouses at Upper Parliament Street to be converted into the Independents District.
The properties were transformed into arts studios, exhibition spaces and music venues in time for the launch
Mr Domela said: "We now have an arts district in the city and the important thing is to maintain the buzz of that after the festival."
The aim of the district, she said, is to bring internationallyacclaimed shows to Liverpool which will run alongside the work of emerging regional talent.
During the Biennial, artists were using the buildings free of charge and, when it is over, studio space will be available at minimum rates.
The Independents District is funded by the Afoundation, which has invested £3m to support the arts in Liverpool over the last six years.
