I don't know about architectural archeology. To me the most important technology transfer (to use the modern vernacular) was 'movable type' which was invented by the Chinese a long time before Guttenberg. The technology of putting characters together on a press and inking them onto paper, only got to Europe due to Genghis Khan and the Mongolians--who have--similar to latin languages, a fixed number of characters in their writing(i.e. A-Z). The Chinese have close to 30,000 characters in their written language--making movable type not practical for Chinese, but as the Mongolians swept across the Asian Steppe to Europe, creating the largest continuous 'country' in the world's history (from China to the Mediterranean Sea, knowledge in Europe about the Mogols spread to the West. It is not surprising that paper making techniques perfected in China, quickly replaced hand painted/printed text on vellum (thinned out leather) as wood pulp was much more available (and sustainable) than to kill 1 animal for just a few pages of text.

There are archeological sites in Mali (West Africa) that had Persian and even Chinese artifacts were found dating a long ways back showing that trade routes though not as extensive as later silk road and later times, but still existed as humans traveled further back than was thought.

It's too bad Alexandria's library was destroyed in the Roman days as it was THE largest library ever made and had tens of thousands of papyrus scrolls going back hundreds of years and in my opinion, along with the Holocaust is one of the most impactful tragedies in human history.