The Danubian provinces of the Later Roman Empire (the area between present day eastern Bavaria and the Romanian Dobruja) are not well known, due to the paucity of literary sources from or about that region. Yet it was regularly at the centre of the great political, military and religious events of Late Antiquity, when the fate of the Empire was played out in the context of the great invasions/migrations. Located on a critical point of the Empire's borders, these provinces had an important network of fortifications, around which was organised the Romanisation of the territory. Thus, most of its episcopal sees lie directly on the so-called "limes", in military camps which became towns. In addition, the episcopate was the most stable and durable Roman institution in the region, since it was the only one to survive the successive invasions. Nevertheless, the question of Christianisation has not resulted in any complete synthesis since Jacques Zeiller's "Les origines chrétiennes dans les provinces danubiennes de l'Empire romain" (Paris, 1918). Thus, the DANUBIUS project will reconsider the question in the light of the scientific advances made in the last hundred years, both in terms of archaeology and history, for the period between the 3rd century, which saw the first evidence of the existence of a clergy in the region, and the 8th century, during which the Byzantine episcopal hierarchy gave way to a new ecclesiastical order. It would be clearly impossible to study all the Danubian provinces in only three years. Therefore, this project - which is the first stage of a long-term research program - is focusing on the last reaches of the Danube to be lost by Constantinople, which is also the part of the river which is best documented from literary sources, viz. the Lower Danube (the Late Roman provinces of Dacia Ripensis, Moesia Secunda and Scythia). To do so, it has been decided to develop a geographic information system (GIS) model of the episcopal sees and other Christian sites, structured around three axes. The first axis foresees the establishment of an analytic database of the sources of Christianity in the Lower Danube. This database, which will bring together all material and written published traces of that religion, will constitute the main core for the development of the GIS model, with the intention that it should be at the same time useful to archaeologists, historians and epigraphists. The second axis is planned around the archaeological explorations of the Late Roman fortress of Zaldapa (Krushari, Bulgaria), through conventional excavations, as well as non-invasive techniques of investigation. The field results of that case study, which began in 2014, will complement the database of the first axis. The third axis was conceived in order to offer a first historical interpretation of the sources collated in the first axis database, through the compilation of a Christian prosopography of the Lower Danube, while offering the foundation for a historical study of its ancient ecclesiastical organisation. Two formats will be produced: 1- a computer database is planned for the period between the 3rd century and the year 787; 2- a printed version, extending to the whole "Dioecesis Thraciarum", will be derived from that database, stopping in the year 641, as a volume of the "Prosopographie chrétienne du Bas-Empire" series. All these tools will bring us closer to a "total history" of the Christianisation of the Eastern Danubian provinces of the Roman Empire, as that history will be studied in the light of archaeological testimonies and the latter will be analysed with regard to the written sources.

In 2006, Sofia University (K-TRIO coordinator) as EURAXESS bridgehead organisation involved the newly established Bulgarian network in the first Researchers Night. Since then, it organised 14 European Researchers Nights, and attracted several new partners from education, research and industry. The overall K-TRIO objective coincides with the goal of the MSCA & Citizens action: "to bring research and researchers closer to the public at large, to increase the awareness of research and innovation activities and to boost public recognition of science and research education", and “to show the role of researchers for science and economy, as well as the impact of researchers’ work on citizens’ daily lives”. The strategic long-term objectives are: fostering the interest of young talents to STEAM and research career, nurturing a new culture of creativity, scientific curiosity, innovative spirit and responsibility to environmental preservation, as well as enhancing the public readiness to engage in Citizens Science, Open Science and Open Innovation activities. The Consortium will pay due attention in all pre-events and 2022-23 ERNs on the importance of the ERA and EEA, and their synergy, for the European recovery, dual transformation and knowledge-based growth. The project will create greater understanding on EU policy, and how R&I contribute for well-being of people and sustainable development, and highlight the common European efforts for bridging global challenges, building Green Economy and Digital Single market, Smart Cities and Smart Factories, and take full advantage of Clean Technologies, Internet of Things (IoT), Artificial Intelligence, BIG Data and Cloud computing. The R&I role in resolving present COVID crises will be also highlighted. The already established networking with teachers, schools and STEM centres will become well-structured, and will integrate many researchers in mentoring of students or events in secondary schools and partners universities.

Since 2006, members of EURAXESS Bulgaria have organised 12 European Researchers Nights (ERN), and have attracted several new consortium members with different profiles – universities, research institutes, NGOs, entrepreneurs. Based on past experience, the main goal of Researchers in the Knowledge Triangle (K-TRIO 4) project is to bring researchers closer to society, attract young people to STEM and boost citizens science. The project will contribute for increasing the number of researchers and innovators in Bulgaria by making the society, and young people, aware of excellent European achievements in research and innovation, and of the success of Centres of Excellence (CoE) and Centres of Competence and their contribution to the Intelligent Strategy for Smart Specialisation in Bulgaria and regional development. Aware of the need of changing stereotypes and nurturing a new culture in research and innovation, the consortium will make young people aware of the multiple career paths of researchers (incl. MSC fellows), best-practice examples of researchers achievements, and research infrastructure in Bulgaria. Special emphasis will be made on European policy and on funding for research and innovation provided by EU RTD programs and Structural Funds. With a large variety of pre-events, online activities and 2-days ERN events in many Bulgarian cities, the project will create greater understanding on how research and innovation contribute for well-being of people and sustainable development, and highlight the common European efforts for building Digital Single market, Factories of the Future, Smart Cities, and take full advantage of BIG Data and Cloud computing. With the involvement of all CoE UNITe partners, and their large network, in addition to EURAXESS Bulgaria, K-TRIO 4 will cover all Bulgarian regions. Forum Science will guide a professional science communication, and ensure greater visibility of K-TRIO 4 activities.

Since 2006, members of EURAXESS Bulgaria have organized 13 European Researchers Nights (ERN), and have attracted several new consortium members with different profiles - universities, research institutes, NGOs, entrepreneurs. Based on past experience, the main goal of Researchers in the Knowledge Triangle (K-TRIO 5) project is to bring researchers closer to society, attract young people to STEM and boost Citizens Science. The project will contribute for increasing the number of researchers in Bulgaria by making the society, and young people, aware of excellent European achievements in research and innovation (R&I), and of the Centers of Excellence (CoE) and Centers of Competence and their contribution to green, smart and sustainable regional development. In 2020 the consortium made several steps for changing stereotypes and nurturing a new culture in R&I, and making young people aware of the multiple career paths of researchers (incl. MSC fellows), best-practice examples of researchers achievements, and research infrastructure in Bulgaria. Special emphasis will be made on European policy and on funding for R&I provided by EU RTD programs and Structural Funds. With a large variety of pre-events, online activities and 2-days ERN events in many Bulgarian cities, the project will create greater understanding on how R&I contribute to well-being of people and sustainable development, and highlight the common European efforts for Green and Digital transformation, building Smart Cities, and taking full advantage of BIG Data, Artificial Intelligence and Cloud computing. With the involvement of all CoE UNITe partners, and their large network, in addition to EURAXESS Bulgaria, K-TRIO 5 will cover all Bulgarian regions. Forum Science will guide a professional science communication, and ensure greater visibility of project activities.