diff --git a/confarchive/model.py b/confarchive/model.py
index 2471eb3..b05531c 100644
--- a/confarchive/model.py
+++ b/confarchive/model.py
@@ -41,6 +41,7 @@ class Conference(TimeStampedModel):
     url = Column(String)
     schedule_xml_url = Column(String)
     short_name = Column(String, unique=True)
+    venue_id = Column(Integer, ForeignKey("venue.id"))
 
     people_detail = relationship(
         "ConferencePerson", lazy="dynamic", back_populates="conference"
@@ -54,6 +55,46 @@ class Conference(TimeStampedModel):
         lazy="dynamic",
     )
 
+    venue = relationship("Venue", back_populates="conferences")
+
+
+class City(TimeStampedModel):
+    """City."""
+
+    __tablename__ = "city"
+    id = Column(Integer, primary_key=True)
+    slug = Column(String, nullable=False, unique=True)
+    name = Column(String, nullable=False)
+    country_code = Column(String, ForeignKey("country.alpha2"), nullable=False)
+    wikidata_qid = Column(String, nullable=False)
+
+    venues = relationship("Venue", back_populates="city")
+    country = relationship("Country", back_populates="cities")
+
+
+class Venue(TimeStampedModel):
+    """Venue."""
+
+    __tablename__ = "venue"
+    id = Column(Integer, primary_key=True)
+    name = Column(String, nullable=False)
+    city_id = Column(Integer, ForeignKey("city.id"))
+    wikidata_qid = Column(String, nullable=False)
+
+    conferences = relationship("Conference", back_populates="venue")
+    city = relationship("City", back_populates="venues")
+
+
+class Country(TimeStampedModel):
+    """Country."""
+
+    __tablename__ = "country"
+    alpha2 = Column(String, primary_key=True)
+    name = Column(String)
+    wikidata_qid = Column(String, nullable=False)
+
+    cities = relationship("City", back_populates="country")
+
 
 class ConferencePerson(Base):
     __tablename__ = "conference_person"
diff --git a/main.py b/main.py
index 798636a..27ce2f3 100755
--- a/main.py
+++ b/main.py
@@ -101,7 +101,7 @@ def top_events() -> sqlalchemy.orm.query.Query:
         database.session.query(model.Event.title, func.count())
         .group_by(model.Event.title)
         .order_by(func.count().desc())
-        .having(func.count() > 5)
+        .having(func.count() > 3)
     )
     return q
 
@@ -235,6 +235,29 @@ def top_speakers_page() -> str:
     return flask.render_template("top_speakers.html", top_speakers=top_speakers())
 
 
+@app.route("/country")
+def country_list() -> str:
+    """Country list."""
+    return flask.render_template("country_list.html", items=model.Country.query)
+
+
+@app.route("/city/<int:city_id>/venue/new", methods=["GET", "POST"])
+def add_venue(city_id: int) -> str | Response:
+    """Add new venue."""
+    city = model.City.query.get(city_id)
+    if flask.request.method != "POST":
+        return flask.render_template("add_venue.html", city=city)
+
+    name = flask.request.form["name"]
+    wikidata_qid = flask.request.form["wikidata_qid"]
+    venue = model.Venue(name=name, city=city, wikidata_qid=wikidata_qid)
+    database.session.add(venue)
+    database.session.commit()
+
+    endpoint = flask.endpoint
+    return flask.redirect(flask.url_for(endpoint))
+
+
 @app.route("/wikidata")
 def link_to_wikidata() -> str:
     items = []
diff --git a/templates/add_venue.html b/templates/add_venue.html
new file mode 100644
index 0000000..9175418
--- /dev/null
+++ b/templates/add_venue.html
@@ -0,0 +1,30 @@
+{% extends "base.html" %}
+
+{% block title %}New venue{% endblock %}
+
+  {% block content %}
+  <div class="container">
+    <div class="row">
+    <h1>Conference archive</h1>
+    <p><a href="{{ url_for("index") }}">home</a></p>
+
+    <h2>New venue</h2>
+
+    <p>City: {{ city.name }}, {{ city.country.name }}</p>
+
+    <form>
+      <div class="mb-3">
+        <label for="name" class="form-label">Name</label>
+        <input type="text" class="form-control" id="name" name="name">
+      </div>
+      <div class="mb-3">
+        <label for="wikidata_qid" class="form-label">Wikidata QID</label>
+        <input type="text" class="form-control" id="wikidata_qid" name="wikidata_qid">
+      </div>
+      <button type="submit" class="btn btn-primary">Submit</button>
+    </form>
+
+
+  </div>
+  </div>
+{% endblock %}
diff --git a/templates/country_list.html b/templates/country_list.html
new file mode 100644
index 0000000..374ce8b
--- /dev/null
+++ b/templates/country_list.html
@@ -0,0 +1,39 @@
+{% extends "base.html" %}
+
+{% block title %}Countries{% endblock %}
+
+  {% block content %}
+  <div class="container">
+    <div class="row">
+    <h1>Conference archive</h1>
+    <p><a href="{{ url_for("index") }}">home</a></p>
+
+    <h2>Countries</h2>
+
+    {% for item in items %}
+    <div>
+      <h4>{{ item.name }}</h4>
+      <p><a href="https://www.wikidata.org/wiki/{{ item.wikidata_qid }}">Wikidata: {{ item.wikidata_qid }}</a></p>
+      <div>
+        <ul>
+        {% for city in item.cities %}
+        <li>
+          {{ city.name }}
+          (<a href="https://www.wikidata.org/wiki/{{ item.wikidata_qid }}">{{ item.wikidata_qid }}</a>)
+          &mdash;
+          {% if city.venues %}
+            {% for venue in city.venues %}
+            {{ venue.name }}
+            {% endfor %}
+          {% endif %}
+          <a href="{{ url_for("add_venue", city_id=city.id) }}">add venue in city</a>
+        </li>
+        {% endfor %}
+        </ul>
+      </div>
+    </div>
+    {% endfor %}
+
+  </div>
+  </div>
+{% endblock %}