Architectural features, such as the forms, designs, and decorations of buildings, are major attractions for all
people around world. Although a few thousand years ago, very few individuals were able to travel to other
nations, at the present a majority of populations are able to travel to other countries to get knowledge about
other cultures, other peoples, and other architectural features. Today, millions of people travel to other
countries just to see how peoples, foods, living environments, and forms and designs of buildings in other
countries look like.

The present series is a contribution to make available for all people around the world to see in pictures
the architectural features (i. e., forms, designs, decorations of buildings) in selected countries. It is a
comparative, pictorial introduction of architectural features in six selected countries to show the talents,
skills, and masterships of builders in creation of architectural forms and designs in the selected countries.

Specifically, there are two main architectural styles in Europe (--as well as in mountainous countries such as
Armenia and Georgia, ) and in Iran. While a stone architecture is common in Europe and in the mountainous
countries, a clay architecture is used in Iran. A comparative display of the two styles, the stone vs. clay
architecture, therefore, is the main theme of the series titled: A Comparative Display Of Art And Architecture.
Volume five of this series is about architectural styles in three historic cities of Germany ( Frankfurt am Main,
Dusseldorf, and Muenster [Munster]) and Iran.

Using a functional-equivalency approach, the series focuses on architectural features from Europe and
mountainous countries and Iran that, while structurally are different, functionally are similar or have similarity
with each other. For example, both a church and a mosque are religious buildings with similar functions but
with different structures. Although there are numerous published books about art and architecture in Europe
or in Iran separately, but none makes a comparative introduction using a functional- equivalency approach.

The present series, therefore, should be regarded as the first original work that seeks to present a comparative,
pictorial introduction of two different architectural styles, stone vs. clay architectural styles, by displaying their
main features side by side. For example, the illustrations are grouped into several categories (Introduction)
[ i. e, 1) Historic or Heritage Buildings; 2) Stone (Khachkar) vs. Brick or Tile decorations; and 3) Religious
Buildings: Churches vs. Jam'a mosques]. (Otherwise, assuming that the images collected and presented in
this volume are also presented randomly in some other books about art and architecture in Armenia or in Iran,
an estimated 50 to 100 books on the subjects of art and architecture in either Germany or Iran should be
browsed over, here or there, to find similar images collected in this volume.)

Volume V of this series compares architectural features in Germany to similar, clay architectural features in
historic cities of Iran. The work is expected to make available for the readers a quick and an easy comparative
views of the architectural forms and designs in three historic cities from Germany ( Dusseldorf, Muenster, and
Frankfurt am Main) as compared to their similar, clay architectural features in historic cities of Iran.