diff --git a/glyphs/chain_1666600000_64px.gif b/glyphs/chain_1666600000_64px.gif
new file mode 100644
index 000000000..ebe181085
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diff --git a/icons/flex_app_chain_1666600000.gif b/icons/flex_app_chain_1666600000.gif
new file mode 100644
index 000000000..6575822e6
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diff --git a/icons/nanos_app_chain_1666600000.gif b/icons/nanos_app_chain_1666600000.gif
new file mode 100644
index 000000000..6e4e96d16
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diff --git a/icons/nanox_app_chain_1666600000.gif b/icons/nanox_app_chain_1666600000.gif
new file mode 100644
index 000000000..874e47094
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diff --git a/icons/stax_app_chain_1666600000.gif b/icons/stax_app_chain_1666600000.gif
new file mode 100644
index 000000000..a7ab29206
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diff --git a/makefile_conf/chain/harmony.mk b/makefile_conf/chain/harmony.mk
new file mode 100644
index 000000000..0210324bf
--- /dev/null
+++ b/makefile_conf/chain/harmony.mk
@@ -0,0 +1,4 @@
+PATH_APP_LOAD_PARAMS += "44'/1023'"
+TICKER = "ONE"
+CHAIN_ID = 1666600000
+APPNAME = "Harmony"
diff --git a/src/network.c b/src/network.c
index 521e6d057..438aa81c0 100644
--- a/src/network.c
+++ b/src/network.c
@@ -107,6 +107,8 @@ static const network_info_t NETWORK_MAPPING[] = {
     {.chain_id = 168587773, .name = "Blast Sepolia", .ticker = "ETH"},
     {.chain_id = 245022926, .name = "Neon EVM Devnet", .ticker = "NEON"},
     {.chain_id = 245022934, .name = "Neon EVM Mainnet", .ticker = "NEON"},
+    {.chain_id = 1666600000, .name = "Harmony ONE S0 Mainnet", .ticker = "ONE"},
+    {.chain_id = 1666600001, .name = "Harmony ONE S1 Mainnet", .ticker = "ONE"},
     {.chain_id = 11297108109, .name = "Palm Network", .ticker = "PALM"},
 };