The book itself measures 28.5 x 22.5 x 1.0 centimeters, so in the standard of book sizes it is an octavo. It consists of a total of 60 pages but only half of the pages are filled with content images. Overall it only contains 2 pages full of text.
The content is divided in two parts (Gothic Architecture Decorated; Gothic Architecture, Part the Second): The first part consists of a large collection of temples, banqueting, summer and green houses, gazebo’s, alcoves, faced, garden and umbrello’d seats, terminari’s and rustic garden seats, rout houses and hermitages for summer and winter, obelisks, pyramids etc. Likewise designs of the gothic orders with their proper ornaments and rules for drawing them. The second part is about forty three designs of paling of various sorts for parks and clumps of trees, gates, hatches etc. Likewise doors and windows with proper heads to them, sashes of different kinds etc.
There is always an illustration on a full page following by a blank page and all of the illustrations were drawn by hand. As it is in the title “Gothic Architecture”, Paul Decker describes various ways of common gothic architecture by focusing on designs of the gothic orders with their proper ornaments and rules for drawing them.