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In recent years, the design community has witnessed the development of several design approaches aimed at taking into account the diversity of human abilities and conditions during design. One of these approaches is inclusive design, used here as an umbrella term to cover also universal design and design for all. This article addresses some of the common questions that arise when inclusive design is considered in relation to the built environment. It discusses how inclusive design is defined and interpreted, what its relevance, implications and challenges are in relation to the built environment, how it relates to other significant design issues, and how it can be fostered in the future. This introduction to the idea of inclusive design is of interest to built environment professionals and researchers seeking a more holistic approach to the built environment. Foregrounding the diversity in human interactions with the built environment supports reflection on the human impact of design decisions. By offering diverse spatial qualities and use opportunities, inclusive design has the potential to help addressing the challenges of our diverse and ageing society in a sustainable way.

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In this work we attempt to elucidate the chronological and geographical origin of deeply coloured and black glass dating between 100 bc and ad 300 on the basis of their major and trace element compositions. Samples from the western and eastern parts of the Roman Empire were analysed. Analytical data were obtained by means of a scanning electron microscope – energy‐dispersive system (SEM–EDS, 63 samples analysed) and laser ablation – inductively coupled plasma – mass spectrometry (LA–ICP–MS, 41 samples analysed). Among the glass fragments analysed, dark brown, dark purple and dark green hues could be distinguished. Only among the dark green fragments could a clear compositional distinction be observed between fragments dated to the periods before and after ad 150. In the early samples (first century bc to first century ad), iron, responsible for the green hue, was introduced by using impure sand containing relatively high amounts of Ti. In contrast, a Ti‐poor source of iron was employed, containing Sb, Co and Pb in trace quantities, in order to obtain the dark green colour in the later glass samples. The analytical results obtained by combining SEM–EDS and LA–ICP–MS are therefore consistent with a differentiation of glassmaking recipes, detectable in glass composition, occurring in the period around ad 150.

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