AstraMentisCredits
Almost everything you see here we wrote ourselves, but not all of it. The paintings are in museums, the poems were written by someone a hundred years ago, and the kanji strokes were drawn by another person with patience. This page says what belongs to whom, and under what permission it is used.
What is ours
The questions, the explanations, the ladder of each area, the programming glossaries, the observations about the paintings and the breather lines are original to AstraMentis. The maths, astronomy and chemistry exercises are generated by the app itself.
KanjiVG · Ulrich Apel
The kana and kanji strokes you trace with your finger in Japanese, with their order and direction. The derived files the app uses keep the same licence.
Project Gutenberg
Public domain
The stories and most of the poems come from here. Only books Gutenberg marks as free of copyright are imported; if it does not confirm that, the import stops. The texts are public domain: on import the Project Gutenberg header, footer and trademark are stripped, so the cards are not distributed as its editions. It is named here as provenance.
Projekt Runeberg
Public domain
The Swedish poems by Erik Axel Karlfeldt and Verner von Heidenstam, from editions of 1898 and 1899.
Wikimedia Commons
Public domain, CC0, CC BY or CC BY-SA, depending on the file
Reproductions of paintings and classical music recordings. Only files with a recognised free licence are used, and every card links to the file's own page, where its licence appears.
Musopen
Public domain
Some of the classical music recordings, released by Musopen and distributed through Commons.
Art Institute of Chicago
CC0
Paintings from its open-access collection, which the museum publishes without reserving rights.
The Metropolitan Museum of Art
CC0
Works its API marks as public domain. Those that are not are never imported.
Cleveland Museum of Art
CC0
Works whose record declares CC0. Any other rights status discards the card.
Rijksmuseum
Public domain
Collection linked from the painting records, to carry on looking at the museum.
Natural Earth
Public domain
The country outlines and the grid of the geography and astronomy maps, baked at 1:110m scale.
Lichess
CC0
The chess puzzles and their themes. Lichess's puzzle database is released into the public domain.
Cormorant Garamond, Instrument Sans, Noto Serif JP e IBM Plex Mono
The app's type: the serif of the headings, the text face, the Japanese one and the code one.
If you believe something here should not be, write to the contact on the privacy notice and it will be taken down while it is checked.