Continuity and sustainability are key themes in conservation; the subject of myriad case studies and the object of policies throughout the world. Yet the achievement of such objectives in the context of development, conflict or accidental damage can seem both daunting and intractable. The five papers assembled for this volume nevertheless demonstrate the resilience of the sector in our attempts to understand and resolve the complexities raised by the historic environment in the modern world. Destruction as a result of armed conflict is all too familiar at the present time yet reconstruction has a long and complex history. Roha Khalaf’s paper focusses on reconstruction and its potential benefits. As Roha writes in the introductory abstract reconstruction can ‘re-establish the thread of continuity with a pre-conflict time and change people’s conditions for the better . . .' whilst policy ‘can help define a strategy for recovery, address underlying vulnerabilities, build resilience, regenerate livelihoods, and improve well-being’. These are important principles which can be seen in action in many of the papers of ‘Heritage under Pressure’ reviewed by Henry Chapman. Accidental damage by fire is another ever present threat, made more immediate by the bush fires raging in Australia and the April 2019 damage to the cathedral of Notre Dame in Paris. Yet for conservation one of the most striking aspects of the response to the Notre Dame fire was not the extent of damage or the cause of the fire but the commitment by President Macron to reconstruct and repair the damage within 5 years. The key, as Simon Kincaid warns, is clarity of purpose. A well informed and clearly defined programme of conservation is critical to successful reconstruction. In the course of preparing the current article, with its focus on the philosophical aspects of post-fire decision-making, Simon has identified a range of important practical challenges that require attention, both in the immediate aftermath of a serious fire in a historic building and in any subsequent reconstruction. An second article is in preparation which will consider these further firstly by assessing the immediate post-fire challenges (including structural viability, temporary protection, recording and archaeological salvage), before going on to evaluate the challenges, and in some cases opportunities, that might be presented in subsequent reconstruction, if indeed this is the appropriate option. Inappropriate use, neglect and redundancy are critical factors in the erosion of the historic environment and there is a long tradition of case studies exemplifying the adaptive re-use of historic buildings. Today adaptive re-use is recognised as an emerging discipline with its own body of developing theory and practice. In 2019 Plevoets and Van Cleempoel reviewed the historic background of re-use from a spontaneous process in the 19 century to the present day. Several papers in this journal have presented projects and case studies highlighting the huge variety and potential for re-use whilst acknowledging an underlying rationale or subtext to many proposals. These are often contested, both at the inception of a project and during its implementation or operational period. The THE HISTORIC ENVIRONMENT: POLICY & PRACTICE 2020, VOL. 11, NO. 1, 1–3 https://doi.org/10.1080/17567505.2020.1717036

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连续性和可持续性是保护的关键主题；众多案例研究的主题和全世界的政策对象。然而，在发展，冲突或意外破坏的背景下实现这些目标似乎既艰巨又棘手。尽管如此，为该卷撰写的五篇论文仍显示了该部门在我们理解和解决现代世界历史环境所带来的复杂性方面的韧性。目前，由于武装冲突而造成的破坏已经非常熟悉，但重建历史悠久而复杂。Roha Khalaf的论文集中在重建及其潜在利益上。正如罗哈（Roha）在介绍性摘要中所写，重构可以“在冲突前的时间重新建立连续性的线程，并改善人们的状况。” 。。” 而政策“可以帮助制定恢复策略，解决潜在的漏洞，增强抵御能力，恢复生计并改善福祉”。这些都是重要的原则，在亨利·查普曼（Henry Chapman）评论的《压力下的遗产》许多论文中都可以看到。火灾造成的意外伤害是另一种持续存在的威胁，澳大利亚的丛林大火和2019年4月对巴黎圣母院的破坏造成的损失更加直接。然而，对于保护而言，对巴黎圣母院大火反应最显着的方面之一不是破坏程度或起火原因，而是马克龙总统承诺在5年内重建和修复破坏。正如Simon Kincaid警告的那样，关键是目的明确。充分了解和明确定义的保护计划对于成功重建至关重要。在撰写本文的过程中，西蒙（Simon）着眼于火灾后决策的哲学方面，发现了一系列需要注意的重要实际挑战，包括历史建筑发生严重火灾后的直接后果。以及随后的任何重建。正在准备第二篇文章，该文章将首先通过评估火灾后立即面临的挑战（包括结构可行性，临时保护，记录和考古救助），再进一步考虑这些挑战，然后再评估这些挑战，在某些情况下还包括机会如果确实是适当的选择，则在随后的重建中提出。不适当的使用，疏忽和冗余是侵蚀历史环境的关键因素，并且案例研究的悠久传统已成为对历史建筑进行适应性再利用的例证。如今，适应性重用已被视为一门新兴学科，它具有自身发展的理论和实践。在2019年，Plevoets和Van Cleempoel回顾了从19世纪的自然过程到如今的重复使用的历史背景。该杂志上的几篇论文介绍了一些项目和案例研究，重点介绍了重用的巨大多样性和潜力，同时也承认了许多建议的基本原理或潜台词。无论是在项目开始时，还是在项目实施或运营期间，这些问题通常都会引起争议。历史环境：《政策与实践2020》，第一卷。11号 1，1-3 https://doi.org/10.1080/17567505.2020.1717036