diff --git a/lib/institutions_block.rb b/lib/institutions_block.rb
new file mode 100644
index 0000000..9f5db10
--- /dev/null
+++ b/lib/institutions_block.rb
@@ -0,0 +1,63 @@
+class InstitutionsBlock < CommunitiesBlock
+
+  def self.description
+    _('Institutions')
+  end
+
+  def profile_count
+    profile_list.count
+  end
+
+  def default_title
+    n_('{#} institution', '{#} institutions', profile_count)
+  end
+
+  def help
+    _('This block displays the institutions in which the user is a member.')
+  end
+
+  def footer
+    owner = self.owner
+    case owner
+    when Profile
+      lambda do |context|
+        link_to s_('institutions|View all'), :profile => owner.identifier, :controller => 'profile', :action => 'communities'
+      end
+    when Environment
+      lambda do |context|
+        link_to s_('institutions|View all'), :controller => 'search', :action => 'communities'
+      end
+    else
+      ''
+    end
+  end
+
+  def profile_list
+    result = nil
+    visible_profiles = profiles.visible.includes([:image,:domains,:preferred_domain,:environment])
+    if !prioritize_profiles_with_image
+      result = visible_profiles.all(:limit => get_limit, :order => 'profiles.updated_at DESC').sort_by{ rand }
+    elsif profiles.visible.with_image.count >= get_limit
+      result = visible_profiles.with_image.all(:limit => get_limit * 5, :order => 'profiles.updated_at DESC').sort_by{ rand }
+    else
+      result = visible_profiles.with_image.sort_by{ rand } + visible_profiles.without_image.all(:limit => get_limit * 5, :order => 'profiles.updated_at DESC').sort_by{ rand }
+    end
+
+    communities_with_institution_list = []
+
+    result.each do |r|
+      if r.class == Community and r.institution?
+        communities_with_institution_list << r
+      end
+    end
+
+    result = communities_with_institution_list
+
+    result.slice(0..get_limit-1)
+  end
+
+  def profiles
+    owner.communities
+  end
+
+end
diff --git a/lib/mpog_software_plugin.rb b/lib/mpog_software_plugin.rb
index a99c693..5b51814 100644
--- a/lib/mpog_software_plugin.rb
+++ b/lib/mpog_software_plugin.rb
@@ -455,6 +455,12 @@ class MpogSoftwarePlugin < Noosfero::Plugin
     end
   end
 
+  def self.extra_blocks
+    {
+      InstitutionsBlock => {:type => [Environment, Person]}
+    }
+  end
+
   private
 
   # Add and remove the user from it's institutions communities
diff --git a/test/unit/institutions_block_test.rb b/test/unit/institutions_block_test.rb
new file mode 100644
index 0000000..ca35f1d
--- /dev/null
+++ b/test/unit/institutions_block_test.rb
@@ -0,0 +1,37 @@
+require File.dirname(__FILE__) + '/../../../../test/test_helper'
+require File.dirname(__FILE__) + '/plugin_test_helper'
+
+class InstitutionsBlockTest < ActiveSupport::TestCase
+  include PluginTestHelper
+  should 'inherit from Block' do
+    assert_kind_of Block, InstitutionsBlock.new
+  end
+
+  should 'declare its default title' do
+    InstitutionsBlock.any_instance.stubs(:profile_count).returns(0)
+    assert_not_equal Block.new.default_title, InstitutionsBlock.new.default_title
+  end
+
+  should 'describe itself' do
+    assert_not_equal Block.description, InstitutionsBlock.description
+  end
+
+  should 'give empty footer on unsupported owner type' do
+    block = InstitutionsBlock.new
+    block.expects(:owner).returns(1)
+    assert_equal '', block.footer
+  end
+
+  should 'list institutions' do
+    user = create_person("Jose_Augusto", "jose_augusto@email.com", "aaaaaaa", "aaaaaaa", "jose_silva@email.com", "DF", "Gama")
+
+    institution  = create_private_institution "inst", "00000000000000", "country", "state", "city"
+    institution.community.add_member(user)
+
+    block = InstitutionsBlock.new
+    block.expects(:owner).at_least_once.returns(user)
+
+    assert_equivalent [institution.community], block.profiles
+  end
+
+end
--
libgit2 0.21.2