Throughout the French regime and in the early decades of British rule, imprisonment was a means of detaining debtors to ensure payment, the accused before trial, or the guilty before punishment. Prisons have evolved from simple places for incarceration (where protection of the public is paramount) to instruments of punishment (where deprivation of liberty is the penalty for breaking the law), to settings for reform (where attempts are made to mould the guilty to conform with society's norms). Prison architecture reflects society's changing attitudes toward crime and punishment.
