  The evaluation of sky characteristics plays a fundamental role for many
astrophysical experiments and ground-based observations. In solar physics, the
main requirement for such observations is a very low sky brightness value, that
is, less than one-millionth of the solar disk brightness. Few places match such
requirement for ground-based, out-of-eclipse coronagraphic measurements. A
candidate coronagraphic site is the Dome C plateau in Antarctica. In this
paper, we show the first results of the sky brightness measurements at Dome C
with the Extreme Solar Coronagraphy Antarctic Program Experiment (ESCAPE) at
Italian-French Concordia Station, on Dome C, Antarctica (3300 m) during the
summer XXXIV and XXXV Expeditions of the "Italian Piano Nazionale Ricerche
Antartiche" (PNRA). The sky brightness measurements were carried out with the
internally-occulted Antarctic coronagraph - AntarctiCor. In optimal atmospheric
conditions, the sky brightness of Dome C has reached values of the order of 1.0
to 0.7 millionth of of the solar disk brightness.
