diff --git a/.gitignore b/.gitignore
index 31929643..8086c1df 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,3 +28,6 @@ doc/_build/*
 .coverage
 htmlcov
 /.pytest_cache/
+
+# IDE settings
+/.idea/
\ No newline at end of file
diff --git a/AUTHORS.rst b/AUTHORS.rst
index 7afa0b12..7777197a 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -17,6 +17,7 @@ Other contributors, listed alphabetically, are:
 * `@guyzmo <https://github.com/guyzmo>`_
 * `@jammon <https://github.com/jammon>`_
 * `@mrmadcow <https://github.com/mrmadcow>`_
+* `@PascalBru <https://github.com/pascalbru>`_
 * `@perette <https://github.com/perette>`_
 * `@prashnts <https://github.com/prashnts>`_
 * `@rkeilty <https://github.com/rkeilty>`_
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index bbc084c1..ea5e5f6f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -13,6 +13,7 @@ Ics.py changelog
    format (thanks @muffl0n, @e-c-d and @chauffer)
  - Fix all-day events lasting multiple days by using a DTEND with a date and not a datetime (thanks @raspbeguy)
  - Fix off by one error on the DTEND on all day events (issues #92 and #150)
+ - Add support for classification (issue #177)
 
 **************
 0.4
diff --git a/ics/event.py b/ics/event.py
index 0a805c63..8e4329a7 100644
--- a/ics/event.py
+++ b/ics/event.py
@@ -54,6 +54,7 @@ def __init__(self,
                  alarms=None,
                  categories=None,
                  status=None,
+                 classification=None,
                  ):
         """Instantiates a new :class:`ics.event.Event`.
 
@@ -71,6 +72,7 @@ def __init__(self,
             alarms (:class:`ics.alarm.Alarm`)
             categories (set of string)
             status (string)
+            classification (string)
 
         Raises:
             ValueError: if `end` and `duration` are specified at the same time
@@ -105,6 +107,7 @@ def __init__(self,
         if alarms is not None:
             self.alarms.update(set(alarms))
         self.status = status
+        self.classification = classification
 
         if categories is not None:
             self.categories.update(set(categories))
@@ -253,6 +256,22 @@ def status(self, value):
             raise ValueError('status must be one of %s' % statuses)
         self._status = value
 
+    @property
+    def classification(self):
+        return self._classification
+
+    @classification.setter
+    def classification(self, value):
+        if value is not None:
+            classifications = ('PUBLIC', 'PRIVATE', 'CONFIDENTIAL', 'iana-token', 'x-name')
+            if not isinstance(value, str):
+                raise ValueError('classification must be instance of str')
+            if value not in classifications:
+                raise ValueError('classification must be one of %s' % ', '.join(classifications))
+            self._classification = value
+        else:
+            self._classification = None
+
     def __repr__(self):
         name = "'{}' ".format(self.name) if self.name else ''
         if self.all_day:
@@ -519,6 +538,12 @@ def status(event, line):
         event.status = line.value
 
 
+@Event._extracts('CLASS')
+def classification(event, line):
+    if line:
+        event.classification = line.value
+
+
 @Event._extracts('CATEGORIES')
 def categories(event, line):
     event.categories = set()
@@ -625,6 +650,12 @@ def o_status(event, container):
         container.append(ContentLine('STATUS', value=event.status))
 
 
+@Event._outputs
+def o_classification(event, container):
+    if event.classification:
+        container.append(ContentLine('CLASS', value=event.classification))
+
+
 @Event._outputs
 def o_categories(event, container):
     if event.categories:
diff --git a/tests/event.py b/tests/event.py
index 576a3ad6..037f0df6 100644
--- a/tests/event.py
+++ b/tests/event.py
@@ -5,7 +5,8 @@
 from ics.event import Event
 from ics.icalendar import Calendar
 from ics.parse import Container
-from .fixture import cal12, cal13, cal15, cal16, cal17, cal18, cal19, cal20, cal32
+from .fixture import cal12, cal13, cal15, cal16, cal17, cal18, cal19, cal20, cal32,\
+    cal33_1, cal33_2, cal33_3, cal33_4, cal33_5, cal34
 
 CRLF = "\r\n"
 
@@ -457,3 +458,59 @@ def test_issue_92(self):
 
         assert e.begin == arrow.get('2016-10-04')
         assert e.end == arrow.get('2016-10-05')
+
+    def test_classification_input(self):
+        c = Calendar(cal12)
+        e = next(iter(c.events))
+        self.assertEqual(None, e.classification)
+
+        c = Calendar(cal33_1)
+        e = next(iter(c.events))
+        self.assertEqual('PUBLIC', e.classification)
+
+        c = Calendar(cal33_2)
+        e = next(iter(c.events))
+        self.assertEqual('PRIVATE', e.classification)
+
+        c = Calendar(cal33_3)
+        e = next(iter(c.events))
+        self.assertEqual('CONFIDENTIAL', e.classification)
+
+        c = Calendar(cal33_4)
+        e = next(iter(c.events))
+        self.assertEqual('iana-token', e.classification)
+
+        c = Calendar(cal33_5)
+        e = next(iter(c.events))
+        self.assertEqual('x-name', e.classification)
+
+    def test_classification_input_wrong_value(self):
+        with pytest.raises(ValueError):
+            Calendar(cal34)
+
+    def test_classification_output(self):
+        e = Event(name="Name")
+        self.assertNotIn("CLASS:PUBLIC", str(e).splitlines())
+
+        e = Event(name="Name", classification='PUBLIC')
+        self.assertIn("CLASS:PUBLIC", str(e).splitlines())
+
+        e = Event(name="Name", classification='PRIVATE')
+        self.assertIn("CLASS:PRIVATE", str(e).splitlines())
+
+        e = Event(name="Name", classification='CONFIDENTIAL')
+        self.assertIn("CLASS:CONFIDENTIAL", str(e).splitlines())
+
+        e = Event(name="Name", classification='iana-token')
+        self.assertIn("CLASS:iana-token", str(e).splitlines())
+
+        e = Event(name="Name", classification='x-name')
+        self.assertIn("CLASS:x-name", str(e).splitlines())
+
+    def test_classification_bool(self):
+        with pytest.raises(ValueError):
+            Event(name="Name", classification=True)
+
+    def test_classification_wrong_value(self):
+        with pytest.raises(ValueError):
+            Event(name="Name", classification='wrong_value')
diff --git a/tests/fixture.py b/tests/fixture.py
index 4b513b71..b2dc84f1 100644
--- a/tests/fixture.py
+++ b/tests/fixture.py
@@ -611,3 +611,87 @@
     'END:VEVENT',
     'END:VCALENDAR',
 ]
+
+cal33_1 = """
+BEGIN:VCALENDAR
+PRODID:-//Apple Inc.//Mac OS X 10.9//EN
+BEGIN:VEVENT
+DTEND;TZID=Europe/Berlin:20120608T212500
+SUMMARY:Name
+DTSTART;TZID=Europe/Berlin:20120608T202500
+LOCATION:MUC
+SEQUENCE:0
+CLASS:PUBLIC
+END:VEVENT
+END:VCALENDAR
+"""
+
+cal33_2 = """
+BEGIN:VCALENDAR
+PRODID:-//Apple Inc.//Mac OS X 10.9//EN
+BEGIN:VEVENT
+DTEND;TZID=Europe/Berlin:20120608T212500
+SUMMARY:Name
+DTSTART;TZID=Europe/Berlin:20120608T202500
+LOCATION:MUC
+SEQUENCE:0
+CLASS:PRIVATE
+END:VEVENT
+END:VCALENDAR
+"""
+
+cal33_3 = """
+BEGIN:VCALENDAR
+PRODID:-//Apple Inc.//Mac OS X 10.9//EN
+BEGIN:VEVENT
+DTEND;TZID=Europe/Berlin:20120608T212500
+SUMMARY:Name
+DTSTART;TZID=Europe/Berlin:20120608T202500
+LOCATION:MUC
+SEQUENCE:0
+CLASS:CONFIDENTIAL
+END:VEVENT
+END:VCALENDAR
+"""
+
+cal33_4 = """
+BEGIN:VCALENDAR
+PRODID:-//Apple Inc.//Mac OS X 10.9//EN
+BEGIN:VEVENT
+DTEND;TZID=Europe/Berlin:20120608T212500
+SUMMARY:Name
+DTSTART;TZID=Europe/Berlin:20120608T202500
+LOCATION:MUC
+SEQUENCE:0
+CLASS:iana-token
+END:VEVENT
+END:VCALENDAR
+"""
+
+cal33_5 = """
+BEGIN:VCALENDAR
+PRODID:-//Apple Inc.//Mac OS X 10.9//EN
+BEGIN:VEVENT
+DTEND;TZID=Europe/Berlin:20120608T212500
+SUMMARY:Name
+DTSTART;TZID=Europe/Berlin:20120608T202500
+LOCATION:MUC
+SEQUENCE:0
+CLASS:x-name
+END:VEVENT
+END:VCALENDAR
+"""
+
+cal34 = """
+BEGIN:VCALENDAR
+PRODID:-//Apple Inc.//Mac OS X 10.9//EN
+BEGIN:VEVENT
+DTEND;TZID=Europe/Berlin:20120608T212500
+SUMMARY:Name
+DTSTART;TZID=Europe/Berlin:20120608T202500
+LOCATION:MUC
+SEQUENCE:0
+CLASS:wrong_value
+END:VEVENT
+END:VCALENDAR
+"""
\ No newline at end of file