When on Google Earth 21

After searching the entire coast of Cyprus for some reason, I found WOGE 20 in Finland. So, here is number 21 in the "When on Google Earth" series (click for larger view):

Although it is a bit hard to see, there were two long walls (the one on the north still largely intact) stretching from the coast to the citadel above the modern city (left). A more detailed view of the citadel and north wall (click for larger version):

I will post a hint in 24 hours, if no one has figured it out by then.

The Rules of When on Google Earth are as follows:

Q: What is When on Google Earth?

A: It’s a game for archaeologists, or anybody else willing to have a go!

Q: How do you play it?

A: Simple, you try to identify the site in the picture.

Q: Who wins?

A: The first person to correctly identify the site, including its major period of occupation, wins the game.

Q: What does the winner get?

A: The winner gets bragging rights and the chance to host the next When on Google Earth on his/her own blog!

Previous winners:

#	Host:	Victor:	Site:	Period:
1	Shawn Graham	Chuck Jones	Takht-i Jamshid / Persepolis terrace, Iran	Achaemenid period
2	Chuck Jones	PDD	Church of Saint Simeon at Qalat Siman, Syria	5th-6th c. CE
2.1	Chuck Jones	Paul Zimmerman	Qal’at al-Bahrain	16th c. CE
3	Paul Zimmerman	Heather Baker	Baraqish (Yathill), Yemen	Minaean
4	Heather Baker	Jason Ur	Mohenjo Daro,	ca. 2600-1900 BCE
5	Jason Ur	Dan Diffendale	Monte Albán, Oaxaca, Mexico	1st-5th centuries CE
6	Dan Diffendale	Claire of Geevor Mine	Segontium, Caernarfon, Wales	77ish to about 390 CE
7	Claire of Geevor Mine	Ivan Cangemi	Carn Euny	ca. 500 BCE-100 CE
8	Ivan Cangemi	Southie Sham	Monks Mound (Cahokia), IL, USA	fl. 1050-1200
9	Southie Sham	Dan Diffendale	Gergovia	fl. 1st c. BCE
10	Dan Diffendale	Dorothy King	Kastro Larissa/Argos, Greece	ca. 1100 CE
11	Dorothy King	Daniel Pett	Utica, Tunisia	8th century BCE–until 2nd Century CE
12	Daniel Pett	Neil Silberman	Caesarea Maritima, Israel	1st century CE–Present
13	Neil Silberman	Chuck Jones	Graceland, Memphis, TN, United States	1939 CE–Present
14	Chuck Jones	Aphaia	Bam Citadel, Iran	pre-6th century BC–19th century CE
15	Aphaia	Daniel Pett	Myrina, Lemnos, Greece	Classical Greek–present
16	Daniel Pett	Paul Barford	Dambulla Cave Temple, Sri Lanka	1st century BCE
17	Paul Barford	Scott McDonough	Rosetta (Rashid), Egypt	Ptolemaic, Mamluk
18	Scott McDonough	Lindsay Allen	Ani, Turkey	Medieval, 10th-14th centuries CE
19	Lindsay Allen	Heather in Vienna	South Shields, England, UK	Roman Imperial
20	Heather in Vienna	Scott McDonough	Suomenlinna/Sveaborg fortress, Helsinki, Finland	1748-present