When God Shared a vision of the Future Beis HaMikdash with the Prophet Yechezkel (Ezekiel), the Prophet questioned His intent , asking:
Since the Jews were in exile and unable to rebuild the Beis Hamikdash, what purpose would revealng its design serve ?
God answerd: "Even though they do not build it now, let them study the design of the House and I will consider it as if they were occupied in its constuction."
When Rabbi Yom Tov Lippman Heller, the Tosafos Yom Tov, encountered these words of the Midrash, he took them to heart and composed a text that would clearly explain the details of Yechezkel's vision of the Future Beis HaMikdash in a systematic and easily comprehensible manner, He included diagrams and sketches to enable a reader to visualize that future structure to the fullest degree possible.
Now this landmark text is being presented with a vocalized Hebrew text, a facing translation, pictures of a modal of that future structure, and illustrative diagrams.
