A perfect number is a positive integer the sum of whose proper divisors is equal to the number itself.
Peristyle
Range of columns surrounding an architectural feature.
Peristylium
Redirected to peristyle.
Perran Foundry
Cornish foundry established in 1791 to supply steam-engine pumps and heavy machinery to mines, waterworks and ironworks.
Perranarworthal
Mostly rural parish in West Cornwall.
Pest House
Post-medieval forerunner of the isolation hospital.
Peter Beatty
English racehorse owner, businessman and aristocrat
Peterloo Massacre
Cavalry charge on 16 August 1819 into a crowd of 60,000–80,000 gathered at St Peter's Field, Manchester, England to demand the reform of parliamentary representation
Phantasmagoria
18th-century ghost show developed by the impresario Paul de Philipsthal, also known as Philidor.
Phantasmascope
Redirected to phenakistoscope.
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