Benedict de Spinoza: Opera contains the complete works of Spinoza in Latin and Dutch, based on a corrected version of the authoritative edition of Carl Gebhardt.

Spinoza, Benedictus de. Opera, im auftrag der Heidelberger akademie der wissenschaften herausgegeben. Edited by Carl Gebhardt. Heidelberg: C. Winter, 1925.

• Vol. 1:
  
  
  • Korte Verhandeling Van God/De Mensch En Des Zelfs Welstand
  • Renati Des Cartes Principiorum Philosophiæ pars I. & II. Cogitata Metaphysica
  • Cogitata Metaphysica Appendix, Continens Cogitata Metaphysica, In Quibus Difficiliores, Quæ In Metaphysices Tam Parte Generali, Quam Speciali, Circa Ens, Ejusque Affectiones, Deum Ejusque Attributa, & Mentem Humanam Occurrunt, Quæstiones Breviter Explicantur
• Vol. 2:
  
  
  • Tractatus De Intellectus Emendatione
  • Ethica
• Vol. 3:
  
  
  • Tractatus Theologico-politicus
  • Adnotationes Ad Tractatum Theologico-politicum
  • Tractatus Politicus
• Vol. 4:
  
  
  • Epistolæ
  • Stelkonstige Reeckening Van Den Regenboog/Reeckening Van Kanssen.
  • Reeckening Van Kanssen