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You've thought about investing in property in London or Hong Kong, but what about Istanbul or Melbourne, Australia? CNBC takes a look at which housing markets across the world posted the biggest gains in 2015 and which ones you should watch next year.

The data are predominately based on property consultancy Knight Frank's most recent Global House Price Index, published at the end of last month, which tracked prices until the end of September. It is based its data on official government or central bank statistics where available.

— By CNBC's Katy Barnato
Posted 30
December 2015

Dan Kitwood, Getty Images News