https://4d.pardesco.com/ 2026-03-20 weekly 1.0 https://4d.pardesco.com/viewer.html 2026-03-20 weekly 0.9 https://4d.pardesco.com/gallery.html 2026-03-20 weekly 0.8 https://4d.pardesco.com/guide/ 2026-03-20 monthly 0.8 https://4d.pardesco.com/shapes/regulars 2026-03-20 monthly 0.8 https://4d.pardesco.com/shapes/pentachoron 2026-03-20 monthly 0.7 https://4d.pardesco.com/images/previews/pentachoron-preview.png Pentachoron (5-cell) - simplest regular 4D polytope https://4d.pardesco.com/shapes/tesseract 2026-03-20 monthly 0.7 https://4d.pardesco.com/images/previews/tesseract-preview.png Tesseract (hypercube) - 4D cube with 8 cubic cells https://4d.pardesco.com/shapes/16-cell 2026-03-20 monthly 0.7 https://4d.pardesco.com/images/previews/16-cell-preview.png 16-cell (hexadecachoron) - 4D cross-polytope https://4d.pardesco.com/shapes/24-cell 2026-03-20 monthly 0.7 https://4d.pardesco.com/images/previews/24-cell-preview.png 24-cell (icositetrachoron) - unique self-dual 4D polytope https://4d.pardesco.com/shapes/120-cell 2026-03-20 monthly 0.7 https://4d.pardesco.com/images/previews/120-cell-preview.png 120-cell (hecatonicosachoron) - 120 dodecahedral cells https://4d.pardesco.com/shapes/600-cell 2026-03-20 monthly 0.7 https://4d.pardesco.com/images/previews/600-cell-preview.png 600-cell (hexacosichoron) - 600 tetrahedral cells https://4d.pardesco.com/learn/what-is-4d 2026-03-20 monthly 0.7 https://4d.pardesco.com/learn/projections 2026-03-20 monthly 0.7 https://4d.pardesco.com/learn/schlafli-symbols 2026-03-20 monthly 0.7 https://4d.pardesco.com/learn/regiments 2026-03-20 monthly 0.7 https://4d.pardesco.com/learn/history 2026-03-20 monthly 0.7 https://4d.pardesco.com/ebook 2026-03-20 monthly 0.6