diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/Projections.kt b/app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/Projections.kt
new file mode 100644
index 0000000..5a2a6a5
--- /dev/null
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/Projections.kt
@@ -0,0 +1,94 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import android.provider.CalendarContract
+
+internal object CalendarProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Calendars._ID,
+        CalendarContract.Calendars.CALENDAR_DISPLAY_NAME,
+        CalendarContract.Calendars.ACCOUNT_NAME,
+        CalendarContract.Calendars.ACCOUNT_TYPE,
+        CalendarContract.Calendars.CALENDAR_COLOR,
+        CalendarContract.Calendars.VISIBLE,
+    )
+
+    const val IDX_ID = 0
+    const val IDX_DISPLAY_NAME = 1
+    const val IDX_ACCOUNT_NAME = 2
+    const val IDX_ACCOUNT_TYPE = 3
+    const val IDX_COLOR = 4
+    const val IDX_VISIBLE = 5
+}
+
+internal object InstanceProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Instances._ID,
+        CalendarContract.Instances.EVENT_ID,
+        CalendarContract.Instances.CALENDAR_ID,
+        CalendarContract.Instances.TITLE,
+        CalendarContract.Instances.BEGIN,
+        CalendarContract.Instances.END,
+        CalendarContract.Instances.ALL_DAY,
+        CalendarContract.Instances.EVENT_COLOR,
+        CalendarContract.Instances.CALENDAR_COLOR,
+        CalendarContract.Instances.EVENT_LOCATION,
+    )
+
+    const val IDX_INSTANCE_ID = 0
+    const val IDX_EVENT_ID = 1
+    const val IDX_CALENDAR_ID = 2
+    const val IDX_TITLE = 3
+    const val IDX_BEGIN = 4
+    const val IDX_END = 5
+    const val IDX_ALL_DAY = 6
+    const val IDX_EVENT_COLOR = 7
+    const val IDX_CALENDAR_COLOR = 8
+    const val IDX_LOCATION = 9
+}
+
+internal object EventDetailProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Events._ID,
+        CalendarContract.Events.TITLE,
+        CalendarContract.Events.DESCRIPTION,
+        CalendarContract.Events.ORGANIZER,
+        CalendarContract.Events.RRULE,
+        CalendarContract.Events.EVENT_COLOR,
+        CalendarContract.Events.CALENDAR_COLOR,
+        CalendarContract.Events.DTSTART,
+        CalendarContract.Events.DTEND,
+        CalendarContract.Events.ALL_DAY,
+        CalendarContract.Events.EVENT_LOCATION,
+        CalendarContract.Events.CALENDAR_ID,
+    )
+
+    const val IDX_EVENT_ID = 0
+    const val IDX_TITLE = 1
+    const val IDX_DESCRIPTION = 2
+    const val IDX_ORGANIZER = 3
+    const val IDX_RRULE = 4
+    const val IDX_EVENT_COLOR = 5
+    const val IDX_CALENDAR_COLOR = 6
+    const val IDX_DTSTART = 7
+    const val IDX_DTEND = 8
+    const val IDX_ALL_DAY = 9
+    const val IDX_LOCATION = 10
+    const val IDX_CALENDAR_ID = 11
+}
+
+internal object AttendeeProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Attendees.ATTENDEE_NAME,
+        CalendarContract.Attendees.ATTENDEE_EMAIL,
+        CalendarContract.Attendees.ATTENDEE_STATUS,
+    )
+
+    const val IDX_NAME = 0
+    const val IDX_EMAIL = 1
+    const val IDX_STATUS = 2
+}
+
+internal object Fallbacks {
+    const val UNNAMED_CALENDAR = "(Unbenannter Kalender)"
+    const val UNTITLED_EVENT = "(Ohne Titel)"
+}