Coat of arms of the Holy Roman Empire from ca. 1433
(emperor Sigismund was the first to use the double-headed eagle, but the single-headed eagle continued to see some use well into the 16th century).

The style is loosely based on that of the mid-16th century (cf. e.g. Jacob Kallenberg (1545)), but largely equivalent designs were used in heraldry well into the 19th century.
File:Banner of the Holy Roman Emperor (after 1400).svg
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