Sometimes it's not easy to let go of the past. We that we wanted to give it one last look, this time by seeing what Manhattan buildings were the most expensive. We went through the data of closed sales and compiled this list of the most expensive buildings by average price per square foot. 

The most expensive building in 2013 was—drumroll—15 Central Park West. At an average price per square foot of $5,636, the Upper West Side building easily edged out the rest of the buildings in Manhattan. 

The South Tower of Time Warner Center ($4,166 / sq. ft.) took the silver medal, and in the North Tower, the Residences at Mandarin Oriental ($4,044 / sq. ft.) closed out the top three.

15 Central Park West, 25 Columbus Circle and 80 Columbus Circle are all located in neighborhood around Columbus Circle. The three boast high end luxury amenities, stunning views, access to major subway and bus lines, as well as proximity to Central Park.

Here are the buildings that finished off the list:

18 Gramercy Park South: $4,042 / sq. ft. - Gramercy Park
Superior Ink: $3,901 / sq. ft. - West Village
The Hudson: $3,714 / sq. ft. - Lincoln Square
Millennium Tower: $3,671 / sq. ft. - Lincoln Square
The Mayfair: $3,637 / sq. ft. - Upper East Side
200 Eleventh Avenue: $3,565 / sq. ft. - Chelsea
One57: $3,548 / sq. ft. - Midtown West