Lazwardلازورد · lapis blue, the colour of the night sky

Sources and credits

Where everything comes from

Lazward shows its work. This page lists the manuscripts we reproduce, the texts our rules come from, and the software that does the arithmetic. If you spot an error, write to hello@lazward.app and we will correct it here.

Images

All images are reproduced from museum open-access programmes that allow commercial use.

Texts behind the rules

Our rule library follows the classical authors directly: Abū Maʿshar's Abbreviation of the Introduction to Astrology; al-Bīrūnī's Book of Instruction in the Elements of the Art of Astrology; al-Qabīṣī's Introduction; the Picatrix (Ghāyat al-Ḥakīm) for the lunar mansions; and al-Ṣūfī's Book of the Fixed Stars for star names. Each reading cites the rule it used.

Software

Planetary positions: Astronomy Engine by Don Cross (MIT licence), accurate to about one arc-minute. Fonts: Cormorant Garamond, Source Serif 4, IBM Plex Sans and Amiri (SIL Open Font Licence), served from this site.

Privacy

Everything on this site is computed in your browser. We do not store birth data, we set no advertising cookies and we use no third-party trackers.