English: An indicative plan showing the medieval walls around Perth, Scotland. The walls followed present day Murray Street, South Methven Street, Canal Crescent and Canal Street. No part of the wall is still standing. The blue line marks the mill lade/ditches. The positions of gates (ports) and towers are marked including:
(A) the site of Perth Castle;
(B) Red Brig Port;
(C) Turret Brig Port;
(D) South Street Port;
(E) Spey Tower;
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