diff --git a/sphinx/source/field.rst b/sphinx/source/field.rst
index 1995e6fee519c976409629a0a3db5a3e89f302fb..fe75f39ff67c62161de1babe77fdc7b6826a6543 100644
--- a/sphinx/source/field.rst
+++ b/sphinx/source/field.rst
@@ -3,6 +3,9 @@
 The ``Field`` class -- Basic class to define fields over spaces
 ...............................................................
 
+The discrete representation of a continuous field over multiple spaces.
+
+In NIFTY, Fields are used to store data arrays and carry all the needed metainformation (i.e. the domain) for operators to be able to work on them. In addition Field has methods to work with power-spectra.
 
 .. autoclass:: Field
     :show-inheritance:
diff --git a/sphinx/source/power_indices.rst b/sphinx/source/power_indices.rst
deleted file mode 100644
index a33fb56848fe18f7066b56b9fc08af62c9247514..0000000000000000000000000000000000000000
--- a/sphinx/source/power_indices.rst
+++ /dev/null
@@ -1,8 +0,0 @@
-.. currentmodule:: nifty
-
-The ``PowerIndices`` class --  Useful set of indices for the PowerSpace
-.......................................................................
-
-.. autoclass:: PowerIndices
-    :show-inheritance:
-    :members:
diff --git a/sphinx/source/spaces.rst b/sphinx/source/spaces.rst
index 6fedbe23059d84f4267f17502ecbb7bce1f12d59..43c0c61bdc3929a478269204b40bb89a7bc11ad7 100644
--- a/sphinx/source/spaces.rst
+++ b/sphinx/source/spaces.rst
@@ -19,7 +19,6 @@ Next to the generic :py:class:`Space` class, NIFTY has implementations of five s
     gl_space
     lm_space
     power_space
-    power_indices
 
 .. currentmodule:: nifty