diff --git a/backend/app/repositories/history_archive_repo.py b/backend/app/repositories/history_archive_repo.py
new file mode 100644
index 0000000..2434020
--- /dev/null
+++ b/backend/app/repositories/history_archive_repo.py
@@ -0,0 +1,103 @@
+"""Ban history archive repository.
+
+Provides persistence APIs for the BanGUI archival history table in the
+application database.
+"""
+
+from __future__ import annotations
+
+import datetime
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    import aiosqlite
+
+
+async def archive_ban_event(
+    db: aiosqlite.Connection,
+    jail: str,
+    ip: str,
+    timeofban: int,
+    bancount: int,
+    data: str,
+    action: str = "ban",
+) -> bool:
+    """Insert a new archived ban/unban event, ignoring duplicates."""
+    async with db.execute(
+        """INSERT OR IGNORE INTO history_archive
+           (jail, ip, timeofban, bancount, data, action)
+           VALUES (?, ?, ?, ?, ?, ?)""",
+        (jail, ip, timeofban, bancount, data, action),
+    ) as cursor:
+        inserted = cursor.rowcount == 1
+    await db.commit()
+    return inserted
+
+
+async def get_archived_history(
+    db: aiosqlite.Connection,
+    since: int | None = None,
+    jail: str | None = None,
+    ip_filter: str | None = None,
+    action: str | None = None,
+    page: int = 1,
+    page_size: int = 100,
+) -> tuple[list[dict], int]:
+    """Return a paginated archived history result set."""
+    wheres: list[str] = []
+    params: list[object] = []
+
+    if since is not None:
+        wheres.append("timeofban >= ?")
+        params.append(since)
+
+    if jail is not None:
+        wheres.append("jail = ?")
+        params.append(jail)
+
+    if ip_filter is not None:
+        wheres.append("ip LIKE ?")
+        params.append(f"{ip_filter}%")
+
+    if action is not None:
+        wheres.append("action = ?")
+        params.append(action)
+
+    where_sql = "WHERE " + " AND ".join(wheres) if wheres else ""
+    offset = (page - 1) * page_size
+
+    async with db.execute(f"SELECT COUNT(*) FROM history_archive {where_sql}", params) as cur:
+        row = await cur.fetchone()
+        total = int(row[0]) if row is not None and row[0] is not None else 0
+
+    async with db.execute(
+        f"SELECT jail, ip, timeofban, bancount, data, action FROM history_archive {where_sql} ORDER BY timeofban DESC LIMIT ? OFFSET ?",
+        [*params, page_size, offset],
+    ) as cur:
+        rows = await cur.fetchall()
+
+    records = [
+        {
+            "jail": str(r[0]),
+            "ip": str(r[1]),
+            "timeofban": int(r[2]),
+            "bancount": int(r[3]),
+            "data": str(r[4]),
+            "action": str(r[5]),
+        }
+        for r in rows
+    ]
+
+    return records, total
+
+
+async def purge_archived_history(db: aiosqlite.Connection, age_seconds: int) -> int:
+    """Purge archived entries older than *age_seconds*; return rows deleted."""
+    threshold = int(datetime.datetime.now(datetime.UTC).timestamp()) - age_seconds
+    async with db.execute(
+        "DELETE FROM history_archive WHERE timeofban < ?",
+        (threshold,),
+    ) as cursor:
+        deleted = cursor.rowcount
+    await db.commit()
+    return deleted
diff --git a/backend/tests/test_repositories/test_history_archive_repo.py b/backend/tests/test_repositories/test_history_archive_repo.py
new file mode 100644
index 0000000..c10997f
--- /dev/null
+++ b/backend/tests/test_repositories/test_history_archive_repo.py
@@ -0,0 +1,60 @@
+"""Tests for history_archive_repo."""
+
+from __future__ import annotations
+
+import time
+from pathlib import Path
+
+import aiosqlite
+import pytest
+
+from app.db import init_db
+from app.repositories.history_archive_repo import archive_ban_event, get_archived_history, purge_archived_history
+
+
+@pytest.fixture
+async def app_db(tmp_path: Path) -> str:
+    path = str(tmp_path / "app.db")
+    async with aiosqlite.connect(path) as db:
+        db.row_factory = aiosqlite.Row
+        await init_db(db)
+    return path
+
+
+@pytest.mark.asyncio
+async def test_archive_ban_event_deduplication(app_db: str) -> None:
+    async with aiosqlite.connect(app_db) as db:
+        # first insert should add
+        inserted = await archive_ban_event(db, "sshd", "1.1.1.1", 1000, 1, "{}", "ban")
+        assert inserted
+
+        # duplicate event is ignored
+        inserted = await archive_ban_event(db, "sshd", "1.1.1.1", 1000, 1, "{}", "ban")
+        assert not inserted
+
+
+@pytest.mark.asyncio
+async def test_get_archived_history_filtering_and_pagination(app_db: str) -> None:
+    async with aiosqlite.connect(app_db) as db:
+        await archive_ban_event(db, "sshd", "1.1.1.1", 1000, 1, "{}", "ban")
+        await archive_ban_event(db, "nginx", "2.2.2.2", 2000, 1, "{}", "ban")
+
+        rows, total = await get_archived_history(db, jail="sshd")
+        assert total == 1
+        assert rows[0]["ip"] == "1.1.1.1"
+
+        rows, total = await get_archived_history(db, page=1, page_size=1)
+        assert total == 2
+        assert len(rows) == 1
+
+
+@pytest.mark.asyncio
+async def test_purge_archived_history(app_db: str) -> None:
+    now = int(time.time())
+    async with aiosqlite.connect(app_db) as db:
+        await archive_ban_event(db, "sshd", "1.1.1.1", now - 3000, 1, "{}", "ban")
+        await archive_ban_event(db, "sshd", "1.1.1.2", now - 1000, 1, "{}", "ban")
+        deleted = await purge_archived_history(db, age_seconds=2000)
+        assert deleted == 1
+        rows, total = await get_archived_history(db)
+        assert total == 1