Besides surviving parts of Merchant Taylors' Hall, the oldest hall interiors now extant are those of the Worshipful Society of Apothecaries, dating from 1668 to 1671; significant portions of the fabric of this building are also medieval, from the 13th-century priory part of which became the Apothecaries' Hall. Several companies that do not have a hall of their own share office premises within the hall of another company on a semi-permanent basis, examples being the Spectacle Makers' Company, which uses part of Apothecaries' Hall, and the Worshipful Company of Shipwrights, which co-habits with the Ironmongers. Many livery halls can be hired for business and social functions, and are popular for weddings, commercial and society meetings, luncheons and dinners.