| Ancient History 79 | Ancient Civilizations and Classical Studies | Resources explore the history, archaeology, and cultures of ancient civilizations, including Egypt, Greece, and Rome. Many sites focus on philosophical thought, literature, and artistic expression from antiquity. |
| Colonial History 119 | Colonial Past and Indonesian Heritage | This collection features resources exploring the history of colonialism, particularly focusing on the relationship between the Netherlands and its former colonies. Many entries document the experiences of individuals and communities impacted by slavery, the transatlantic slave trade, and the Indonesian independence movement. |
| Cultural History 151 | Regional & Local Cultural Heritage | Resources document the history, traditions, and cultural landscapes of various regions and localities. Subjects include historical societies, estates, monuments, archaeological research, and local customs. |
| European History 107 | European & Global Historical Resources | This compilation features websites dedicated to exploring historical events, figures, and cultural developments across Europe and beyond. Resources encompass academic research, genealogical records, travel guides focused on historical sites, and explorations of specific historical periods. |
| General History 28 | History: People, Places & Events | Resources focus on historical research, documentation, and storytelling across various periods and regions. Content includes biographical information, local histories, explorations of cultural practices, and analyses of significant events. |
| History of Science 10 | Science, History & Social Studies | Resources focus on historical research, particularly within scientific disciplines and their societal impact. Included are archives of historical instruments, explorations of influential scientific figures, and studies of cultural history. |
| History of The Middle East 14 | Middle Eastern history, culture, and conflict. | Websites explore the history and culture of the Middle East, with a focus on Israel and Palestine. Resources cover political and social history, memory studies, and the Israeli-Palestinian conflict. |
| History of The Netherlands 74 | History, Culture, and Society | Resources explore the historical and cultural heritage of the Low Countries, spanning from medieval literature to colonial legacies. Many entries focus on local and regional histories, including towns, provinces, and family genealogies, alongside broader themes like slavery and migration. |
| Industrial History 293 | Industrial Heritage and Historic Sites | This compilation documents former factories, mills, and industrial complexes throughout the region, preserving their stories and significance. Websites detail the history of manufacturing, agriculture, and infrastructure, often including restoration projects and visitor information. |
| International History 10 | Colonial History & Shared Pasts | Resources explore historical connections between the region and former colonies, particularly in Brazil, Indonesia, and Suriname. Many sites focus on wartime experiences, including remembrance of casualties, personal accounts, and events like the Kindertransport. |
| Medical History 23 | Healthcare History & Heritage | Resources document the evolution of medical practices, nursing, and healthcare institutions within the region. Many sites focus on preserving historical medical objects, documents, and the legacies of key figures in healthcare. |
| Medieval History 22 | Medieval Studies & Historical Sites | Resources focus on the history of Western manuscripts and medieval intellectual life, including research institutions and digitized datasets. Several entries document fortifications, estates, and castles, detailing their historical significance and ongoing preservation efforts. |
| Military History 507 | Royal Military Heritage and Defense | Explore resources on the historical and contemporary aspects of the Kingdom's armed forces. Discover information on military fortifications, naval history, and veteran support organizations. |
| Roman History 51 | Roman Heritage and Archaeological Sites | Resources focus on the Roman era within the region, encompassing historical routes, archaeological parks, and reconstructed Roman life. Many entries detail the Roman Limes, ancient roads like the Via Belgica and Via Appia, and related archaeological discoveries. |
| Science History 13 | Historical Research & Cultural Studies | Resources focus on the history of science, regional studies, and cultural traditions within the Low Countries. Topics include historical figures, societal developments, and the evolution of specific fields like youth care and space exploration. |
| War 94 | History: War and Military Heritage | This category features websites dedicated to documenting and exploring military history, particularly focusing on World Wars I and II, and the Cold War. Resources include information on war cemeteries, military collections, bunkers, historical accounts of soldiers and civilians, and preservation of military artifacts and sites. |
| World War II 1134 | World War II Remembrance & Heritage | Resources document experiences during and after the Second World War, including military operations, resistance movements, and wartime occupation. Websites detail memorials, historical sites, and personal accounts related to the conflict and its impact on the region. |