The heads of nails (Cabezas clavas) are a series of sculptures representing heads of cats, snakes and birds, combined with human features. They owe this name to the fact that they end like a nail in an extension, which meant that they could easily be embedded into the façade of the temple at symmetrical intervals. One theory assumes that they were the guardians of the temple. They were carved in sandstone of different consistency, quartzite and granite. Unfortunately, of the 56 who were there, only one is still on site. The others have disappeared or are kept in museums. - 1976

View from the semi underground temple of Tiahuanaco to the monumental staircase with the six stone steps and the large restored entrance gate to the Kalasasaya. In the centre the "Ponce" stele of the Shrine of the Sun. - 1976

The Patio Hundido ("sunken courtyard") of Tiahuanaco is an almost square complex with a side length of about 28 m and is surrounded by an enclosure wall about 2 m high and with stone heads. - 1976

This Cabeza clava is located in the Parque monolios in La Paz. - 1976

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