diff --git a/.gitignore b/.gitignore
index 60d3f1e8..2866e304 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,7 @@ node_modules/
 
 # Repo uses npm; yarn.lock is ignored to avoid double-lockfile drift.
 frontend/yarn.lock
+
+**/.venv/
+**/__pycache__/
+*.pyc
diff --git a/tools/import-normalizer/.gitignore b/tools/import-normalizer/.gitignore
new file mode 100644
index 00000000..d48fb3f8
--- /dev/null
+++ b/tools/import-normalizer/.gitignore
@@ -0,0 +1,5 @@
+.venv/
+out/
+review/
+__pycache__/
+*.pyc
diff --git a/tools/import-normalizer/config.py b/tools/import-normalizer/config.py
new file mode 100644
index 00000000..180fe06c
--- /dev/null
+++ b/tools/import-normalizer/config.py
@@ -0,0 +1,100 @@
+"""Tunables for the import normalizer. No logic here — only data tables."""
+from pathlib import Path
+
+# --- Paths ---
+BASE_DIR = Path(__file__).resolve().parent
+REPO_ROOT = BASE_DIR.parent.parent
+IMPORT_DIR = REPO_ROOT / "import"
+
+DOCUMENT_WORKBOOK = IMPORT_DIR / "zzfamilienarchiv aktuell  2 - Kopie 2025-07-05.xlsx"
+DOCUMENT_SHEET = "Familienarchiv"
+PERSON_WORKBOOK = IMPORT_DIR / "Personendatei 2.xlsx"
+PERSON_SHEET = "Tabelle1"
+
+OUT_DIR = BASE_DIR / "out"
+REVIEW_DIR = BASE_DIR / "review"
+OVERRIDES_DIR = BASE_DIR / "overrides"
+
+# --- Header text (lowercased, whitespace-collapsed) -> canonical field ---
+DOCUMENT_HEADER_MAP = {
+    "index": "index",
+    "datei": "file",
+    "box": "box",
+    "mappe": "folder",
+    "briefeschreiberin": "sender",
+    "empfängerin": "receivers",
+    "datum des briefes": "date",
+    "ort": "location",
+    "schlagwort": "tags",
+    "inhalt": "summary",
+}
+DOCUMENT_REQUIRED_FIELDS = {"index"}
+
+PERSON_HEADER_MAP = {
+    "generation": "generation",
+    "familienname": "last_name",
+    "vorname": "first_name",
+    "geb als": "maiden_name",
+    "geburtsdatum": "birth_date",
+    "geburtsort": "birth_place",
+    "todesdatum": "death_date",
+    "sterbeort": "death_place",
+    "verheiratet mit": "spouse",
+    "bemerkung": "notes",
+}
+PERSON_REQUIRED_FIELDS = {"last_name"}
+
+# --- Century rule (archive 1873–1957) ---
+TWO_DIGIT_19XX_MAX = 57   # 00..57 -> 1900+yy
+TWO_DIGIT_18XX_MIN = 73   # 73..99 -> 1800+yy ; 58..72 -> ambiguous -> UNKNOWN
+
+# --- Seasons -> representative month (day = 1) ---
+SEASON_MONTHS = {
+    "frühling": 4, "fruehling": 4, "frühjahr": 4, "fruehjahr": 4,
+    "sommer": 7, "herbst": 10, "winter": 1,
+}
+
+# --- Fixed feasts -> (month, day) ---
+FIXED_FEASTS = {
+    "neujahr": (1, 1),
+    "heiligabend": (12, 24), "heiliger abend": (12, 24),
+    "weihnachten": (12, 25), "weihnacht": (12, 25), "1. weihnachtstag": (12, 25),
+    "silvester": (12, 31), "sylvester": (12, 31),
+}
+
+# --- Movable feasts -> day offset from Easter Sunday ---
+MOVABLE_FEASTS = {
+    "karfreitag": -2,
+    "ostern": 0, "ostersonntag": 0, "ostermontag": 1,
+    "himmelfahrt": 39, "christi himmelfahrt": 39,
+    "pfingsten": 49, "pfingstsonntag": 49, "pfingstmontag": 50,
+    "fronleichnam": 60,
+}
+
+# --- Month names -> number (German + English, full + abbreviations) ---
+MONTHS = {
+    "januar": 1, "jan": 1, "january": 1,
+    "februar": 2, "feb": 2, "febr": 2, "february": 2,
+    "märz": 3, "maerz": 3, "mär": 3, "mar": 3, "march": 3,
+    "april": 4, "apr": 4,
+    "mai": 5, "may": 5,
+    "juni": 6, "jun": 6, "june": 6,
+    "juli": 7, "jul": 7, "july": 7,
+    "august": 8, "aug": 8,
+    "september": 9, "sep": 9, "sept": 9,
+    "oktober": 10, "okt": 10, "oct": 10, "october": 10,
+    "november": 11, "nov": 11,
+    "dezember": 12, "dez": 12, "dec": 12, "december": 12,
+}
+
+ROMAN_MONTHS = {
+    "i": 1, "ii": 2, "iii": 3, "iv": 4, "v": 5, "vi": 6,
+    "vii": 7, "viii": 8, "ix": 9, "x": 10, "xi": 11, "xii": 12,
+}
+
+# --- Person matching ---
+KNOWN_LAST_NAMES = [
+    "von der Heide", "von Massenbach", "von Geldern", "von Gelden", "von Staa",
+    "de Gruyter", "Dieckmann", "Gruber", "Müller", "Wolff", "Cram",
+]
+FUZZY_SUGGEST_THRESHOLD = 0.82  # difflib ratio; suggestions only, never auto-applied
diff --git a/tools/import-normalizer/requirements.txt b/tools/import-normalizer/requirements.txt
new file mode 100644
index 00000000..886c2074
--- /dev/null
+++ b/tools/import-normalizer/requirements.txt
@@ -0,0 +1,2 @@
+openpyxl==3.1.5
+pytest==8.3.4
diff --git a/tools/import-normalizer/tests/__init__.py b/tools/import-normalizer/tests/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tools/import-normalizer/tests/test_config.py b/tools/import-normalizer/tests/test_config.py
new file mode 100644
index 00000000..6384df41
--- /dev/null
+++ b/tools/import-normalizer/tests/test_config.py
@@ -0,0 +1,13 @@
+import config
+
+def test_century_boundaries():
+    assert config.TWO_DIGIT_19XX_MAX == 57
+    assert config.TWO_DIGIT_18XX_MIN == 73
+
+def test_header_maps_cover_required_fields():
+    assert "index" in config.DOCUMENT_HEADER_MAP.values()
+    assert "last_name" in config.PERSON_HEADER_MAP.values()
+
+def test_feast_tables_present():
+    assert config.MOVABLE_FEASTS["pfingsten"] == 49
+    assert config.SEASON_MONTHS["herbst"] == 10