Filming for the series took place in the United Kingdom, at Swansea, Neath, Port Talbot and Margam Castle in Wales. A 265,000-square-foot (24,600 m2) studio in Swansea Gate Business Park was also used and several sets were built to resemble 15th-century Florence.[15] Annie Symons was brought on board as the lead costume designer.[16] Bear McCreary composed the score for the series, and orchestrated the main theme to reflect Leonardo's use of mirror writing.[17] Goyer had a scene in episode five depicting a kiss between Leonardo and Jacopo Saltarelli filmed in secret as he feared network interference.[18]