diff --git a/examples/example_multisig.py b/examples/example_multisig.py
new file mode 100644
index 0000000..f25dc8b
--- /dev/null
+++ b/examples/example_multisig.py
@@ -0,0 +1,17 @@
+from pactus.crypto.bls.signature import Signature
+
+def main() -> None:
+    sig1 = Signature.from_string(
+        "a628a8709fe00366d7150244447cc43e8637d76a20674b006b00f7a61109dab53ba5f1f66cd07219fd1e4a6bc7299d2d"
+    )
+    sig2 = Signature.from_string(
+        "b0d544e501408283ac11ca8ae180f0991349252cc76f9db72011ea4917eca87d4640bcf3fab7b0ab95e9b94f05113587"
+    )
+
+    sig3 = Signature.aggregate([sig1, sig2])
+
+    print(f"Aggregated signature: {sig3.string()}")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/pactus/crypto/bls/bls12_381/__init__.py b/pactus/crypto/bls/bls12_381/__init__.py
new file mode 100644
index 0000000..e69de29