As mentioned in C. E. Blake's article, Springfield, Massachusetts, published in the January, 1894, issue of The New England Magazine, the architecture of the United States Armory at Springfield was inspired by the East India House on Leadenhall Street in London, England, home of the British East India Company. The photos below illustrate the two buildings' similarities.
The Arsenal at Springfield, now home of Springfield Technical Community College. (c. pre-1894)
The East India House in London. The building was razed in 1929. (c. 1817)