The book “Gothic Architecture Decorated” by Paul Decker 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, which is handwritten. Mostly it is composed by architectural drawings, that give an insight on how the buildings look, not on how they are built, with no additional technical elements as construction details or measurements.
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 followed by a blank page to protect the prints. All of the illustrations, which were drawn by hand, represent the important part of the book. The drawings get more detailed the further in the book. 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.