Change Over Time-An International Journal of Conservation and the Built Environment《变化:国际保护与建筑环境杂志》(半年刊). Change Over Time is a semiannual journal publishing original, peer-reviewed research papers and review articles on the history, theory, and praxis of conservation and the built environment. Each issue is dedicated to a particular theme as a method to promote critical discourse on contemporary conservation issues from multiple perspectives both within the field and across disciplines. Themes will be examined at all scales, from the global and regional to the microscopic and material. Past issues have addressed topics such as repair, adaptation, nostalgia, and interpretation and display.