Which major publishing house features a dolphin wrapped around an anchor in its historic logo, a design that dates back to the 16th century?

Behind every great publishing house is an iconic logo that represents their literary tradition and brand identity. These symbols have become as recognizable as the classic works they publish. This trivia question explores the fascinating history behind one of the most enduring logos in the literary world - an emblem that has graced the spines of countless influential books throughout generations.

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Penguin Random House
Doubleday
Aldine Press/Doubleday (now part of Penguin Random House)
Oxford University Press