A PAIR OF 'SACRIFICAL' BLUE-GLAZED BOWLS Yongzheng six-character marks and of the period (4)A PAIR OF 'SACRIFICAL' BLUE-GLAZED BOWLSYongzheng six-character marks and of the periodEach with broad rounded sides resting on a straight foot, the exteriors glazed in a brilliant deep blue thinning to white at the rim and stopping neatly above the foot, the interior and base glazed white, each inscribed with a six-character mark in underglaze blue within a double circle, fitted boxes. 18cm (7 1/8in) diam. (4).Provenance: a European private collection清雍正 霽藍釉碗一對青花「大清雍正年製」楷書款來源：歐洲私人收藏'Sacrificial blue'-glazed ritual vessels such as the present lot, were intended for use on the Imperial altar at the Temple of Heaven. According to the 'Court Regulations for Ceremonial Paraphernalia', edited in 1766, blue-glazed wares were used for the performance of the Winter Solstice sacrifice to Heaven.Compare with a similar single blue-glazed bowl, Yongzheng six-character mark and of the period, which was sold at Sotheby's New York, 23 September 2020, lot 540.is_parse: 20230413image: yuzhan_bonhams_item.jpgsold_price_type: £