A FINE IMPERIAL PAIR OF MONOCHROME BLUE GLAZED PORCELAIN BOWLS, China, underglaze blue Yongzheng six-character marks and period - Provenance: Former old European private collection, assembled prior 1990 - Private property Frankfurt - Cobalt-blue porcelains were associated with the Tiantan, Altar of Heaven, where they were used during imperial rituals. Unsurprisingly, such glazes are sometimes referred to as 'sacrificial blue' (jilan) - Good condition Paar feine monochrom blau glasierte Schalen aus Porzellan CHINA, unterglasurblaue Yongzheng-Sechszeichenmarke in Doppelring und -Periode D. 13,8 cm Provenienz: Ehemals aus einer alten europäischen Privatsammlung, vor 1990 gesammelt, dann Privatbesitz Frankfurt - Gut erhalten