diff --git a/lib/icalendar.ex b/lib/icalendar.ex
index 7a6fb60..da83813 100644
--- a/lib/icalendar.ex
+++ b/lib/icalendar.ex
@@ -4,6 +4,17 @@ defmodule ICalendar do
   """
 
   defstruct events: []
+
+  @typedoc """
+  An ICalendar struct
+
+  * `events`: A list of events
+  """
+
+  @type t :: %__MODULE__{
+          events: [ICalendar.Event.t()]
+        }
+
   defdelegate to_ics(events, options \\ []), to: ICalendar.Serialize
   defdelegate from_ics(events), to: ICalendar.Deserialize
 
diff --git a/lib/icalendar/event.ex b/lib/icalendar/event.ex
index 315c757..d890294 100644
--- a/lib/icalendar/event.ex
+++ b/lib/icalendar/event.ex
@@ -22,6 +22,51 @@ defmodule ICalendar.Event do
             organizer: nil,
             sequence: nil,
             attendees: []
+
+  @typedoc """
+  An Event struct
+
+  * `summary`: The summary of the event
+  * `dtstart`: The start time of the event
+  * `dtend`: The end time of the event
+  * `rrule`: The recurrence rule
+  * `exdates`: The exception dates
+  * `description`: The description of the event
+  * `location`: The location of the event
+  * `url`: The URL of the event
+  * `uid`: The unique identifier of the event
+  * `prodid`: The product identifier of the event
+  * `status`: The status of the event
+  * `categories`: The categories of the event
+  * `class`: The class of the event
+  * `comment`: An optional comment
+  * `geo`: The latitude and longitude of the event
+  * `modified`: The last modified time of the event
+  * `organizer`: The organizer of the event
+  * `sequence`: The sequence number of the event
+  * `attendees`: The attendees of the event
+  """
+  @type t :: %__MODULE__{
+          summary: String.t(),
+          dtstart: DateTime.t(),
+          dtend: DateTime.t(),
+          rrule: map(),
+          exdates: [DateTime.t()],
+          description: String.t(),
+          location: String.t(),
+          url: String.t(),
+          uid: String.t() | integer(),
+          prodid: String.t(),
+          status: String.t(),
+          categories: [String.t()],
+          class: String.t(),
+          comment: String.t(),
+          geo: {float(), float()},
+          modified: DateTime.t(),
+          organizer: String.t(),
+          sequence: integer(),
+          attendees: [map()]
+        }
 end
 
 defimpl ICalendar.Serialize, for: ICalendar.Event do