Southport Gate, sebelumnya bernama ''Africa Gate'', adalah gerbang pertama yang dibangun di Charles V Wall.<ref name=finlayson/> Gerbang ini dibangun oleh insinyur [[bangsa Italia|Italia]] [[Giovanni Battista Calvi]] tahun 1552, di bawah pemerintahan [[Charles V, Kaisar Romawi Suci]].<ref name=gilbard/><ref name=about>{{cite web|title=Gates & Fortifications|url=http://www.aboutourrock.com/sites/fortifications.htm|work=aboutourrock.com|publisher=About Our Rock|accessdate=1 October 2012}}</ref><ref name=skinner>{{cite web|title=The People of Gibraltar - 1740 - Skinner's Moorish Wall|url=http://gibraltar-intro.blogspot.com/2012/04/chapter-xx.html|publisher=Neville Chipulina|accessdate=26 September 2012}}</ref> Southport Gate memiliki [[Lambang Raja Spanyol|Lambang Charles V, Kaisar Romawi Suci]], serta [[lambang Gibraltar]].<ref name=pocket>{{cite journal|title=Gates, Walls & Fortifications|journal=Gibraltar Discover Pocket Guide|date=July 2009|url=http://issuu.com/discovergibraltar/docs/july2009|accessdate=1 October 2012|page=31|publisher=Discover Pocket Guide(s) Gibraltar Ltd.}}</ref><ref name=popular/> Gerbang ini muncul dalam peta Gibraltar tahun 1627 karya insinyur [[bangsa Spanyol|Spanyol]] [[Luis Bravo de Acuña]]. Di peta yang sekarang disimpan oleh [[British Museum]], Southport Gate dan [[Southport Ditch]] diberi label ''Puerta de África'' ({{Lang-en|Africa Gate}}) dan ''Fosso'' ({{Lang-en|Ditch}}) dalam bahasa Spanyol.<ref name=trafalgar>{{cite web|title=Trafalgar Cemetery|url=http://web.archive.org/web/20070206031504/http://www.gib.gi/heritage/trafalgar.html|work=web.archive.org|publisher=Gibraltar Heritage Trust|accessdate=30 September 2012|archive-date=2007-02-06|archive-url=https://web.archive.org/web/20070206031504/http://www.gib.gi/heritage/trafalgar.html|dead-url=noyes}}</ref> Flat Bastion ({{lang-es|Baluarte de Santiago}}), South Bastion ({{lang-es|Baluarte de Nuestra Señora del Rosario}}), dan Southport Ditch merupakan elemen pertahanan gerbang dan kota.<ref name=finlayson>{{cite book|title=The Fortifications of Gibraltar 1068-1945|publisher=Osprey Publishing|isbn=1846030161, 9781846030161|pages=64|url=http://books.google.com/books?id=BC5QBR0oB04C&pg=PA19&lpg=PA19&dq=Daniel+Specklin,+bastion+santiago&source=bl&ots=3y7ffOgq2G&sig=WT0ULpJTIbM9chO3ihvMpbNgqkI&hl=en&sa=X&ei=WIliUPWWI8ierAGs54DQBQ&ved=0CCAQ6AEwAA#v=snippet&q=Baluarte%20de%20Nuesta%20Senora%20del%20Rosario&f=false|author=Clive Finlayson, Darren Fa|edition=illustrated|accessdate=1 October 2012|page=21|date=31 October 2006|archive-date=2013-10-15|archive-url=https://web.archive.org/web/20131015172152/http://books.google.com/books?id=BC5QBR0oB04C&pg=PA19&lpg=PA19&dq=Daniel+Specklin,+bastion+santiago&source=bl&ots=3y7ffOgq2G&sig=WT0ULpJTIbM9chO3ihvMpbNgqkI&hl=en&sa=X&ei=WIliUPWWI8ierAGs54DQBQ&ved=0CCAQ6AEwAA#v=snippet&q=Baluarte%20de%20Nuesta%20Senora%20del%20Rosario&f=false|dead-url=yes}}</ref><ref name=trafalgar/> Southport Ditch adalah parit besar yang membentang di sepanjang sisi selatan Charles V Wall dari ujung barat daya South Bastion hingga Flat Bastion di [[Prince Edward's Gate]].<ref name=chronicle>{{cite news|title=The New Look at Old Southport Ditch|url=http://www.chronicle.gi/headlines_details.php?id=22944|accessdate=1 October 2012|newspaper=Gibraltar Chronicle|date=11 October 2011|archive-date=2013-10-14|archive-url=https://web.archive.org/web/20131014210607/http://www.chronicle.gi/headlines_details.php?id=22944|dead-url=yes}}</ref>
