and others continued the style well into the 16th century, gradually absorbing Italian Renaissance influences. Life-size tomb effigies in stone or alabaster became popular for the wealthy, and grand multi-level tombs evolved, with the Scaliger Tombs of Verona so large they had to be moved outside the church. By the 15th century there was an industry exporting Nottingham alabaster altar reliefs in groups of panels over much of Europe for economical parishes who could not afford stone retables. Portable sculpture Small carvings, for a mainly lay and often female market, became a considerable industry in Paris and some other centres. Types of ivories included small, devotional polyptychs, single figures, especially of the Virgin, mirror-cases, combs, and elaborate caskets with scenes from Romances, used as engagement presents. The very wealthy collected extravagantly elaborate, jewelled and enamelled metalwork, both secular and religious, like the Duc de Berry's Holy Thorn Reliquary, until they ran short of money, when they were melted down again for cash. Gothic sculptures independent of architectural ornament were primarily created as devotional objects for the home or intended as donations for local churches, although small reliefs in ivory, bone and wood cover both religious and secular subjects, and were for church and domestic use. Such sculptures were the work of urban artisans, and the most typical subject for three dimensional small statues is the Virgin Mary alone or with child. Paris was the main centre of ivory workshops, and exported to most of northern Europe, though Italy also had a considerable production. An exemplar of these independent sculptures is among the collections of the Abbey Church of St Denis; the silver-gilt Virgin and Child dates to 1339 and features Mary enveloped in a flowing cloak holding an infantile Christ figure. Both the simplicity of the cloak and the youth of the child presage other sculptures found in northern Europe dating to the 14th century and early 15th century. Such sculpture shows an evolution from an earlier stiff and elongated style, still partly Romanesque, into a spatial and naturalistic feel in the late 12th and early 13th century. Other French Gothic sculptural subjects included figures and scenes from popular literature of the time. Imagery from the poetry of the troubadours was particularly popular among artisans of mirror-cases and small boxes presumably for use by women. The Casket with Scenes of Romances (Walters 71264) of 1330–50 is an unusually large example