This project was executed in order to honour the European Year of Cultural Heritage 2018. It was carried out by six schools coming from north-east-central-south and west Europe: Latvia, Romania, Turkey, Poland, Portugal and The Netherlands. The main goals were to promote the acquisition of skills and competences bearing in mind social and educational value of European cultural heritage by sharing each country´s National Treasures putting them in a historical, political, economic and cultural context. Arts lingers through the project as a red line. Other objectives were: 1.To integrate internationalization in the curriculum of the levels 3 and 4.2.To become schools with an optimistic view of internationalization.3.To become schools where internationalization is not an ad hoc policy, but for the long run in the future.4.To become aware of our own National Treasures in the six participating countries.5.To teach in a project way of meeting objectives of the topics.6.To become aware of each other’s cultural background and pay respect to this.7.To become aware of a European Dimension, in spite of the differences and especially in regard to the difficult economic situation in some of the participating countries. 8.To practice a foreign language (during the entire project, in writing, presenting, talking with each other on the website /eTwinning-platform or other tools)9.To learn more of all languages of the participating countries as it is also a cultural heritage. 10.To be able to practice social skills in hosting someone.11.To use ICT as a tool to have contact for all persons involved (students, teachers, staff, parents) and being able to evaluate our process during the project and to disseminate our results.12.To change the habits when it comes to understand other cultures, to battle prejudice. 13.13 To learn from each other’s strengths and expertise.14. To develop international activities in ALL classes in ALL levels for ALL students. (in the future)14.To be an example to other schools in the region.15.To produce products that can be presented and shared with others, also after the end of the project.16.To produce a website with all National Treasures we have looked at during the project, so at least 24. If possible, we will make a book out of it.During the two years 480 students and 36 teachers were directly involved in this project. The students were between 14-18 years of age coming from secondary education, both general and vocational. Approximately 900 parents were indirectly involved.All activities were carried out in order to fit in our methodology to create six timelines. In order to achieve this, the project was divided in four blocks, two blocks for each year project. Each school made a list of National Treasures to share according to the dates previously selected by teachers and participant students engaged directly, or not, in the project. The dates chosen are a milestone in one´s country. Each National Treasure revealed the economic, political and cultural situation of the country at a time. By sharing this, it was easy, to all partners to establish a timeline and find similarities and differences throughout it. This timeline was especially helpful for students to understand the importance of interconnecting and relating events. The fact that students worked not only the dates they chose, but also two others chosen by the other project partners was also very helpful in developing language (oral/written), organizational (time management; information research and selection; fact-checking), IT (Video editing; PPT presentations; Google forms), cooperative and collaborative learning, and social skills. Ice-breaking activities and welcoming activities were a constant part of the project. All the activities and outcomes of the project are at website created for the project: https://sharingculturaltreasures.weebly.com.Throughout the project we had two teacher training activities, one in The Netherlands and another one in Turkey and four short-term students exchange in the other participating countries. Unfortunately, due to the Sars-Cov2 pandemic, not all schools could be present at the last short-term students exchange in Romania. The project was granted a six-month-extension, so that all the coordinators could meet and ultimate final details and reports. Throughout this extra period, we had several online meetings with ZOOM to ultimate the final part of the project and corresponding goals. In fact, as far as communication effectiveness is concerned, online meetings, WhatsApp group and email communication proved to be very efficient, fast and useful to coordinate the various activities. As to the longer term benefits you could say that the meetings (mobility) gave us the opportunity to learn and compare contents and teaching in foreign schools involved in the project, improve our language skills, experiment and transfer innovative good practices in European schools, experiment with new methodological strategies in intercultural groups, complete activities or collect necessary material, organize events, promote the knowledge of new cultures through joined work. We tried to overcome the difficulties by respecting each other and of course the timetable of the project, cultivating a pleasant climate between us, adjusting the time scheduling keeping in mind the different holidays and exams during each school year, helping the partners who had several difficulties and by being willing to face all the obstacles, in order to achieve the initial aims of the project. The project’s timeline will be used as part of the schools’ curriculum in the Netherlands, while in other countries it will be very helpful for cross-curriculum activities.