"We describe computer algorithms that produce the complete set of isohedral tilings by n-omino or n-iamond tiles in which the tiles are fundamental domains and the tilings have 3-, 4-, or 6-fold rotational symmetry. The symmetry groups of such tilings are of types p3, p31m, p4, p4g, and p6. There are no isohedral tilings with symmetry groups p3m1, p4m, or p6m that have polyominoes or polyiamonds as fundamental domains. We display the algorithms' output and give enumeration tables for small values of n.…"

"The proposition of the paper is that a direct relation held between the spatial shape of the church, its dedication and the cultural and political situation in the region. These churches inspire further studies of the use of the equilateral triangle plan in architecture, particularly for sacred buildings. In the future such studies should result in a more complete review and perhaps a full catalogue of buildings established on such a plan."