Additions in Version 10

• The provision of a facility to display 20 patterns selected at random. This provides the simplest method of browsing the collection. (See the home page.)
• A slideshow which displays a carefully selected set of patterns and shows how of find other similar ones. For the details, see..
• Perfect colouring This is a mathematical concept applying to the tiling of square, hexagons and triangles. For the details, see..
• A few more patterns from Bourgoin which are trigonometrically challenging from Tony Lee, see: Bourgoin, Plate 127, Bourgoin, Plate 128, Bourgoin, Plate 132, and two patterns related to Borgoin ones: Louve pattern, like Bourgoin, Plate 125 and Alcazar pattern like Bourgoin, Plate 129.
• A number of simpler patterns for which a photograph is available are now available. Some of the striking ones are: Bou Inaniya Medersa/Mosque, Meknes, Tomb of Moulay Ishmael, Meknes, Bahia Palace, Marrakesh, Tomb of Moulay Ishmael, Meknes, Sakkala, Tetouan and Alcazar, Seville.

Additions in Version 9

• Links to Photographs. The most important addition is the inclusion of links to photographs of Islamic patterns on David Wade's web site. 160 patterns have such links to a total of 242 photographs.

  One can now search for a pattern which has a photographic link. Most such patterns have just one link, see some examples: Abas and Salman, Plate 3 (a), Mirza Akber, Leather Roll(3), Bourgoin, Plate 91. Note that there is not always an exact match between the photo and the pattern.

  Sometimes there are several contrasting photos: Bourgoin, Plate 42, Bourgoin, Plate 175, El-Said and Parman, Figure 32.

  David Wade's site has many new patterns which will be added to this system in due course.

• Some new examples of the tiling of rectangles with polyominoes have been added from Erich Friedman's web site. See: 5-omino, order 36, [9 by 20], 5-omino, order 81, [9 by 45], 5-omino, order 91, [13 by 35], 4-omino, order 6, [3 by 8], 5-omino, order 21, [7 by 15].
• A few patterns from Bourgoin which are trigonometrically challenging from Tony Lee, see: Bourgoin, Plate 107, Bourgoin, Plate 116, version A, Mosque of al-Ghouri, Minbar (essentially a version of Plate 116), Bourgoin, Plate 125.
• A number of changes have been made to the presentation, including removing some of the details of the references which now appear as links to the references file.

Additions in Version 8

• Tiling rectangles with polyominoes. This is a well-known combinatorial problem. The rectangles are presented in isolation rather than being repeated. For the details, see..
• A special type of polyomino is defined in [wich3]. Software to generate a large number of such tilings using these polyominoes has been produced, but only the original example appears here, see: YEMEN.
• A class of Islamic tiling called Type I has been added from Tony Lee, see FIG4, FIG5, FIG8, FIG10, F6.
• Nine more Islamic patterns from Bourgoin. See: P108, P109, P112, P113, P165, P187, P188B, P189, P190.
• Tony Lee has provided a list of the possible sources of the Bourgoin patterns which has now been added as a comment against each one (for which such information is available).
• A nice spiral from Andrew Glassner has been added: here.
• A number of tilings from the major work of Paccard have been added (more to come...), see: P197, P187D4, P181D3, P200, P202, P210TR, P211TR, P214T,