Index: lib/redmine/wiki_formatting/macros.rb
===================================================================
--- lib/redmine/wiki_formatting/macros.rb       (revision 24052)
+++ lib/redmine/wiki_formatting/macros.rb       (working copy)
@@ -220,20 +220,23 @@
              "{{recent_pages}} -- displays pages updated within the last 7 days\n" +
              "{{recent_pages(days=3)}} -- displays pages updated within the last 3 days\n" +
              "{{recent_pages(limit=5)}} -- limits the maximum number of pages to display to 5\n" +
-             "{{recent_pages(time=true)}} -- displays pages updated within the last 7 days with updated time"
+             "{{recent_pages(time=true)}} -- displays pages updated within the last 7 days with updated time\n" +
+             "{{recent_pages(project=identifier)}} -- displays pages updated within the last 7 days from a specific project"

       macro :recent_pages do |obj, args|
-        return '' if @project.nil?
-        return '' unless User.current.allowed_to?(:view_wiki_pages, @project)
-
-        args, options = extract_macro_options(args, :days, :limit, :time)
+        args, options = extract_macro_options(args, :days, :limit, :time, :project)
         days_to_list = (options[:days].presence || 7).to_i
         limit = options[:limit].to_i if options[:limit].present?
         is_show_time = options[:time].to_s == 'true'
+        project = Project.find_by_identifier(options[:project].to_s) if options[:project].present?
+        project = @project if project.nil?

+        return '' if project.nil?
+        return '' unless User.current.allowed_to?(:view_wiki_pages, project)
+
         pages = WikiPage.
           joins(:content, :wiki).
-          where(["#{Wiki.table_name}.project_id = ? AND #{WikiContent.table_name}.updated_on >= ?", @project.id, days_to_list.days.ago]).
+          where(["#{Wiki.table_name}.project_id = ? AND #{WikiContent.table_name}.updated_on >= ?", project.id, days_to_list.days.ago]).
           order("#{WikiContent.table_name}.updated_on desc, id").
           limit(limit)

@@ -241,7 +244,7 @@
           pages.each do |page|
             concat(
               tag.li do
-                html = link_to(h(page.pretty_title), project_wiki_page_path(@project, page.title))
+                html = link_to(h(page.pretty_title), project_wiki_page_path(project, page.title))
                 html << " (#{time_ago_in_words(page.content.updated_on)})" if is_show_time
                 html
               end
Index: test/unit/lib/redmine/wiki_formatting/macros_test.rb
===================================================================
--- test/unit/lib/redmine/wiki_formatting/macros_test.rb        (revision 24052)
+++ test/unit/lib/redmine/wiki_formatting/macros_test.rb        (working copy)
@@ -566,4 +566,21 @@
       end
     end
   end
+
+  def test_recent_pages_macro_with_project_option
+    @project = Project.find(1)
+    freeze_time do
+      WikiContent.update_all(updated_on: Time.current)
+      @project.wiki.pages.each_with_index do |page, i|
+        page.content.update_attribute(:updated_on, (i + 1).days.ago)
+      end
+
+      with_settings :text_formatting => 'textile' do
+        result = textilizable('{{recent_pages(time=true, days=3, project=' + @project.identifier + ')}}')
+        assert_select_in result, 'ul>li', :count => 3
+        assert_select_in result, 'ul>li:first-of-type', :text => 'Another page (1 day)'
+        assert_select_in result, 'ul>li:last-of-type', :text => 'Child 1 1 (3 days)'
+      end
+    end
+  end
 end