WARSAW, Poland (AP) " Participants in a UNESCO World Heritage conference have put the historic center of Vienna on the U.N. cultural agency's list of sites in danger due to a high-rise construction project there.

The decision was taken Thursday at a conference in Krakow, southern Poland.

The committee said the project for the Vienna Ice-Skating Club_Intercontinental Hotel is against the body's earlier decisions that put a limit on the height of new constructions in the oldest part of the Austrian capital.

It said the project will have a negative effect on the "outstanding universal value" of the site that dates to Celtic times and is on the UNESCO World Heritage list.

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The list of sites in danger draws the international community's attention to conditions that threaten value of unique sites.