After an outstanding career of scholarship in the field of psychiatry, Michele Tansella died in 2015. Long a close friend of this journal (a corresponding editor since 1994), it is now timely to appreciate and to celebrate his contributions to mental health. I will focus mostly on the papers he published in the BJPsych as exemplars of the arc of his wider work. ^{Reference Thornicroft1} In particular I will show how he constructed – over four decades – the building blocks and then the higher levels of his career to become, as he often described himself, an ‘architect for mental health’.

His initial research took place under the mentorship of Professor Malcolm Lader, at the Institute of Psychiatry in London, and addressed the effects and adverse consequences of diazepam use. ^{Reference Tansella, Siciliani, Burti, Schiavon, Zimmermann and Gerna2} As was surprisingly common at that time, his early research focus was quite different from the field in which he later distinguished himself, and indeed he then went on to work closely with Professor Michael Shepherd, who was an enduring influence on all his later work.

Establishing himself in Verona as the Head of the Department of Psychiatry, he increasingly dedicated himself to investigating questions central to epidemiology and to public mental health.

He had scientific curiosity about patterns in the occurrence of cases of mental disorders, and in how services try to respond (and often fail to respond) to these high levels of need. In 1979 he established the Verona Psychiatric Case Register, a powerful tool to monitor the implementation of the Italian psychiatric reform in 1978 in the catchment area of South Verona and the foundation of his team's future population-based studies. He strongly supported the reform and pioneered the community-based psychiatric service in South Verona, the first example in the Veneto region, and subsequently showing that the 1978 Italian Mental Health Act led to reduced hospital admission rates. ^{Reference Tansella3}

The case register produced manifold rewards in its ability to answer fundamental epidemiological questions. For example, he investigated the occurrence of first-episode psychosis, an area in which he made a pioneering contribution. ^{Reference Tansella, Micciolo, Biggeri, Bisoffi and Balestrieri4} He was also among the first to document higher rates of mortality among people with mental illness. ^{Reference Amaddeo, Bisoffi, Bonizzato, Micciolo and Tansella5} Further, he brought an original approach to the psychiatric residency training course at the University of Verona, providing a blend of high-quality instruction, practical clinical experience in hospital and community settings, and an unwavering respect for the needs and perspectives of patients.

During the following decade he intensified his efforts to know how best to provide mental health services, making important contributions to foundational work, such as describing alternatives to hospital admission, ^{Reference Tansella6} defining severe mental illness, ^{Reference Ruggeri, Leese, Thornicroft, Bisoffi and Tansella7} contributing to a suite of internationally harmonised scales to use for mental health services research, ^{Reference Becker, Knapp, Knudsen, Schene, Tansella and Thornicroft8} and using population-based data to understand why people dropped out of care. ^{Reference Amaddeo, Zambello, Tansella and Thornicroft9} Never satisfied with what he knew, he wanted to synthesise all the available evidence on the effectiveness of hospital care and community care, from which synthesis emerged the balanced care model for mental healthcare. ^{Reference Thornicroft and Tansella10–Reference Thornicroft and Tansella12} This evidence chimed with his personal clinical experience – as a pioneer of community-based services in the South Verona region in Italy – that while most mental health resources need to be invested in community treatment, care and support for people with mental illness, there remains a requirement for a relatively small number of acute psychiatric beds to provide high levels of support during crises, and in fact the South Verona service has managed with only 15 acute beds since the psychiatric reform was introduced.

Over and above these activities, he founded the journal EPS in 1994 and remained its Editor-in-Chief for the following two decades. Now entitled Epidemiology and Psychiatric Sciences, his careful scientific oversight ensured that this journal gave international visibility to the best health service and epidemiological research, that it was the first Italian scientific journal to be indexed, and that its impact factor improved steadily year by year. This relentless focus on making practical, evidence-based improvements in services led Michele Tansella towards the field now called ‘implementation science’, namely investigating how best to put proven evidence into routine clinical practice for the benefit of patients. ^{Reference Thornicroft, Lempp and Tansella13,Reference Tansella, Thornicroft and Lempp14}

He accomplished these many gifts to his fields of science while shouldering a remarkable administrative load, for example serving as Dean of the Medical School at the University of Verona for most of his final years, and fully discharging his responsibilities as Head of the local clinical services, and as Head of the World Health Organization Collaborating Centre in Verona. He knew that his ability to fully enact his scientific knowledge depended on his authority within the local services and on the quality of his relationships with all the key people within the local health system. He also knew, especially as he became unwell, that he needed to plan for his legacy by carefully transferring his responsibilities to his senior colleagues. His success in forming these partnerships was made wonderfully manifest by the several hundred colleagues, from near and far, who spoke movingly about his commitment to his work, and his successful ability to move administrative mountains, when paying tribute to him at his retirement Festschrift event in 2014.

For those now beginning to build their research careers, what can be learned from how Michele Tansella constructed his own journey? Whether viewed through the narrower lens of his 29 papers in this journal, or the wider arc of all his 315 published papers, a number of key lessons emerge. He fully committed himself to undertaking research of the very highest level of quality, and never settling for second best. He put himself in senior clinical and management positions in which he could enact his understanding of what treatments and services work best for people with experience of mental illness. He was able to continuously refresh his passion for knowledge by flexibly adapting to new questions and to new challenges, and he kept renewing his own research skills (not always the case among senior researchers). He welcomed working with colleagues across the whole world, and being open to their challenges; and he recognised the value of long-term collaborations to build strong research teams and networks of expert colleagues with complementary skills.

In short, Michele Tansella was an outstanding scientist, friend, mentor and exemplar of a life dedicated to science, with all his creativity, flexibility, curiosity, determination and his commitment to a better world for people with mental illness. ^{Reference Amaddeo, Bisoffi, Bonizzato, Micciolo and Tansella5,Reference Ruggeri, Leese, Thornicroft, Bisoffi and Tansella7,Reference Thornicroft and Tansella10,Reference Garzotto, Burti and Tansella15–Reference Tansella and Thornicroft21} He was the architect of his own career accomplishments, as well as for the progression of many of his professional colleagues and for the progress of community psychiatry across the world. He demonstrated in his own life the importance of acting ethically and proudly to promote public mental health. The BJPsych has been fortunate to benefit from the many contributions of such a fine man.