Originally 103 towers were built between 1805 and 1812 to resist a potential invasion by Napoleon. They were built of brick, 13 foot thick on the seaward side, stood about 30 foot high and were equipped with a cannon on the roof. 74 were built along the Kent and Sussex coastlines from Folkstone to Seaford between 1805 and 1808, the other 29 to protect Essex and Suffolk.
45 of the towers still remain, but many are in ruins or have been converted, so only 9 remain in their original condition. Two supporting forts were built on the south coast at Dymchurch and Eastbourne.
The tower at Dymchurch (No. 24) has been fully restored and is now a museum.
Folkestone to Sandgate towers (1 to 8).
Sandgate to Hythe towers (10 to 15).
Military Canal.
Hythe to Dymchurch towers (19 to 25).
Dymchurch Redoubt.
Rye to Pevensey towers (28 to 55).
Pevensey towers (60 to 66).
Eastbourne Redoubt.
Eastbourne towers (73 to 74).
| Martello | Location | Description |
|---|---|---|
| Martello No. 1 | Folkestone | Being converted to a house (2003) |
| Martello No. 2 | Folkestone | Converted to a house, best seen from the top of No3. Now a holiday letting. |
| Martello No. 3 | Folkestone | Now used as a Visitor Centre |
| Martello No. 4 | Folkestone | Private, unused and overgrown |
| Martello No. 5 | Sandgate | Private, in school grounds |
| Martello No. 6 | Sandgate | Private, unused and overgrown |
| Martello No. 7 | Sandgate | Private, unused and overgrown |
| Sandgate Martello | Sandgate | The modified keep of Sandgate Castle |
| Martello No. 8 | Sandgate | Converted to a house |
| Martello No. 9 | Hythe | Private, unused and overgrown |
| Martellos No. 10 - 12 | Hythe | Demolished |
| Martello No. 13 | Hythe | Converted to a house |
| Martello No. 14 | Hythe | Private, in good condition, on army firing range |
| Martello No. 15 | Hythe | Private, in good condition, on army firing range |
| Military Canal | Hythe to Rye | Canal 30 foot wide and 28 miles in length along the boundary of Romney Marsh. Still in good condition. |
| Martello No. 16 | Hythe | Demolished by the sea |
| Martello No. 17 - 18 | Hythe | Demolished |
| Martello No. 19 | Hythe | Partially demolished by the sea |
| Martello No. 20 - 22 | Dymchurch | Demolished |
| Dymchurch Redoubt | Dymchurch | Built 1806, on army firing range |
| Martello No. 23 | Dymchurch | Converted to a house |
| Martello No. 24 | Dymchurch | Open April - October (weekends), English Heritage |
| Martello No. 25 | Dymchurch | Unused |
| Martello No. 26 - 27 | Dymchurch | Demolished |
| Martello No. 28 | Rye | Unused and rather overgrown, near the harbour. |
| Martello No. 29 | Rye | Demolished by the sea |
| Martello No. 30 | Rye | Unused, overgrown in a back garden. Private. |
| Martello No. 31 - 54 | Rye to Bexhill | Demolished, or washed away by the sea |
| Martello No. 55 | Norman's Bay | Restored |
| Martello No. 56 - 59 | Norman's Bay to Pevensey | Demolished, or washed away by the sea |
| Martello No. 60 | Pevensey | Converted to a house |
| Martello No. 61 | Pevensey | Unused |
| Martello No. 62 | Pevensey | Converted to a house |
| Martello No. 64 | Pevensey | Unused. Photo © Oast House Archive and licensed for reuse under cc-by-sa/2.0 |
| Martello No. 65 | Pevensey | Demolished by the sea |
| Martello No. 66 | Eastbourne | Unused. Photo © Oast House Archive and licensed for reuse under cc-by-sa/2.0 |
| Martello No. 67 - 72 | Eastbourne | Demolished, or washed away by the sea |
| Eastbourne Redoubt | Eastbourne | In use until after World War 2, it is now owned by the Council and is open summer weekends. |
| Martello No. 73 | Eastbourne | The Wish Tower, being restored by Wish Tower Friends. Set in public gardens owned by the Council. |
| Martello No. 74 | Seaford | Open to public |