Home›Sources›TetrabiblosSourcesTetrabiblosCitation FormatsGeneral ReferenceGeneral Reference Citation TextDivinity Atlas. "Tetrabiblos." Accessed August 30, 2026. https://divinity.interactivelion.com/sources/tetrabiblos.Copy General ReferenceAPA StyleAPA Style Citation TextDivinity Atlas. (n.d.). Tetrabiblos. Retrieved August 30, 2026, from https://divinity.interactivelion.com/sources/tetrabiblosCopy APA StyleBibTeXBibTeX Citation Text@misc{divinityatlas-tetrabiblos, author = {Divinity Atlas}, title = {Tetrabiblos}, year = {2026}, url = {https://divinity.interactivelion.com/sources/tetrabiblos}, note = {Accessed August 30, 2026} }Copy BibTeXTetrabiblos is Claudius Ptolemy's own second century Greek treatise laying out the theory and practice of astrology as he and his contemporaries understood it, one of the founding texts of the entire Western astrological tradition. It is rated at the top of the reliability scale as a primary source, meaning it is authoritative for what Ptolemy himself taught and for what the earliest systematic astrological doctrine actually said, not for whether any of that doctrine describes anything real. Use it to document historical astrological theory and its transmission; it is not evidence that a planetary influence exists, and a claim about how later astrologers modified or departed from Ptolemy needs a source that traces that later history.FactsClaims Backed By This Source (2,413 claims)Comments (0)Reader Challenges (0 open reader challenges)FactsCitationAuthorWell-attestedClaudius PtolemyPublisherWell-attestedW. FoulshamPublication YearWell-attested1900URLWell-attestedhttps://archive.org/details/ptolemystetrabib00ptolSource TypeWell-attestedprimary-textAssessmentReliability TierWell-attested1Ptolemy's own second century treatise, the foundational primary text of Western astrology, cited as a primary source for the tradition's own classical formulation rather than for its scientific validity.NotesWell-attestedFoundational classical Greek treatise on astrology, 2nd century CE.Claims Backed By This Source (2,413 claims)This source backs 2,413 claims across the atlas. As facts: 1,279 well-attested, 1 open question. As cited relationships: 545 holds. Plus 588 entities citing it as a general reference with no single fact or relationship attached.Disposition By TopicSabian Symbols, 1,080 claims: 720 well-attested, 360 general references.Egyptian Terms, 612 claims: 120 well-attested, 432 holds, 60 general references.Articles, 154 claims: 151 well-attested, 3 general references.Decans, 134 claims: 72 well-attested, 26 holds, 36 general references.Fixed Stars, 88 claims: 46 well-attested, 42 general references.Continents, 37 claims: 13 well-attested, 1 open question, 19 holds, 4 general references.Religious Symbols, 32 claims: 23 well-attested, 1 holds, 8 general references.Seasons, 32 claims: 16 well-attested, 12 holds, 4 general references.Characteristics Signified, 30 claims: 14 well-attested, 10 holds, 6 general references.Aspects, 27 claims: 20 well-attested, 7 general references.Body Parts, 27 claims: 15 well-attested, 12 general references.Polarities, 26 claims: 7 well-attested, 17 holds, 2 general references.Sign Modes, 25 claims: 10 well-attested, 12 holds, 3 general references.Zodiac Signs, 24 claims: 12 well-attested, 12 general references.People Signified, 22 claims: 9 well-attested, 8 holds, 5 general references.Planets, 17 claims: 7 well-attested, 10 general references.Esoteric Texts, 10 claims: 7 well-attested, 2 holds, 1 general references.Disciplines, 8 claims: 6 holds, 2 general references.Open Questions, 8 claims: 7 well-attested, 1 general references.Sources, 8 claims: 8 well-attested.Activities Signified, 4 claims: 2 well-attested, 2 general references.Arabic Parts, 4 claims: 4 general references.Historical Figures, 2 claims: 2 general references.Goetic Demons, 1 claims: 1 general references.Shem Angels, 1 claims: 1 general references.Well-attested1,279Activities SignifiedDyingTravelingArticlesA Minor AspectA Relation the Sources Barely NameAir in Western PracticeAn Angle of the HoroscopeAn AspectAn AspectAn AspectAn AspectAn AspectAngle and OriginAngle and OriginAngle and OriginAngle and OriginAngle and OriginAstrology With a Physics Underneath ItCardinal, Movable, Tropical: One Mode, Several NamesChildren in the Hellenistic ReadingDiseases of the SoulEarth in Western PracticeFire in Western PracticeFrom Alexandria to the Renaissance CurriculumGreat Ambition, and Where the Reading Comes FromJupiter and Saturn, and Honour with a FallJupiter and Saturn, and the Pilot of the VoyageJupiter and Venus, by the Compiling TraditionLibya, the Southwest QuarterMars and Jupiter, and Prosperity Through WorkMars and Jupiter, and the Most Favourably Read Star in the SkyMars and Jupiter, the Eagle's NatureMars and Mercury, and a Mixed ReputationMars and Mercury, and the Colour ArgumentMars and Mercury, by the HornMars, by PtolemyMars, the Immortal TwinMercury and Mars, with Mercury Doing the WorkMercury, the Mortal TwinOne Table, Two TraditionsOutside the Inhabited WorldPtolemy Counts Siblings from the ParentsPtolemy Divides the Soul in TwoPtolemy Reads Marriage from the LightsRead with Altair, Under AquilaRead within Aquila, Mars with JupiterSaturn and Venus, an Unlucky ReputationShort Journeys and LongSothis, the Nile, and the Oldest Use of a StarTemperament, and What a Chart Claims About a BodyThe Alternating SignsShowing 1 to 50 of 715 entities carrying this claim. NextOpen question1ContinentsAmericasHolds545Characteristics SignifiedIntelligenceMindSensualitySoulStabilityContinentsAfricaAmericasAsiaEuropeDecansDecan 1 of AquariusDecan 1 of AriesDecan 1 of CancerDecan 1 of CapricornDecan 1 of GeminiDecan 1 of LeoDecan 1 of PiscesDecan 1 of SagittariusDecan 1 of ScorpioDecan 1 of TaurusDecan 2 of AquariusDecan 2 of CancerDecan 2 of CapricornDecan 2 of GeminiDecan 2 of LeoDecan 2 of LibraDecan 2 of PiscesDecan 2 of VirgoDecan 3 of AriesDecan 3 of LeoDecan 3 of LibraDecan 3 of PiscesDecan 3 of SagittariusDecan 3 of ScorpioDecan 3 of TaurusDecan 3 of VirgoDisciplinesFixed StarsEgyptian TermsAquarius Fifth Term: SaturnAquarius First Term: MercuryAquarius Fourth Term: MarsAquarius Second Term: VenusAquarius Third Term: JupiterAries Fifth Term: SaturnAries First Term: JupiterAries Fourth Term: MarsAries Second Term: VenusAries Third Term: MercuryCancer Fifth Term: SaturnCancer First Term: MarsCancer Fourth Term: JupiterCancer Second Term: VenusShowing 1 to 50 of 111 entities carrying this claim. NextGeneral References588Activities SignifiedDyingTravelingArabic PartsPart of ExaltationPart of FatherPart of FortunePart of MotherArticlesWhat a Characteristic Entry CoversWhat a Polarity Entry CoversWhat a Season Entry CoversAspectsConjunctionOppositionQuincunxSemi-sextileSextileSquareTrineBody PartsAnklesArmsBreastsFeetGenitalsHeadHeartKneesNeckStomachThighsWaistCharacteristics SignifiedIntelligenceMindSensualitySoulStabilityStrengthContinentsAfricaAmericasAsiaEuropeDecansDecan 1 of AquariusDecan 1 of AriesDecan 1 of CancerDecan 1 of CapricornDecan 1 of GeminiDecan 1 of LeoDecan 1 of LibraDecan 1 of PiscesDecan 1 of SagittariusDecan 1 of ScorpioDecan 1 of TaurusDecan 1 of VirgoShowing 1 to 50 of 587 entities carrying this claim. NextComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0 open reader challenges)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.View At A Past YearThe atlas records no dated fact of its own for this entry, so there is no other year to choose.Show This Year