Devon’s largest city has long been linked with England’s commercial and maritime history. Plymouth actually means "the navy", and special navy days are held every other year in August. Its vast natural harbor has played a significant role in Britain's maritime affairs. Sir Francis Drake sailed from Plymouth to defeat the Spanish Armada. Bomb damage during World War II decimated the city, but the cobbled streets and timber-framed houses of an old district called the Barbican, escaped damage. The Merchant's House is a particular fine timber building and a local museum. The promenade of the Hoe commands the best views over the nautical comings and goings in Plymouth Sound. Alongside are an excellent aquarium, a vast 17th-century citadel and Plymouth Dome, a high-tech introduction to the city.