SEVILLE.
Socle of the Entrance Arch to the Chapel.
57 FROM THE CENTRE OF FOUR EQUAL SQUARES DESCRIBE CIRCUMFERENCES AS IN PLAN. INSCRIBE THEREIN THE STARRED OCTAGON, THE PROLONGED SIDES OF WHICH DETERMINE THE QUADRILATERAL ROSETTE.
58 THE SQUARE OF DISTRIBUTION IS A RECTANGLE LENGTHENED, FROM WHICH OCTAGONS ARE TRACED. TERNARY STARS, YET WITH SIX POINTS, AND PAIRED STARS WITH FIVE POINTS FILL IN THE RECTANGLE.