Mosques

Mosques are places of worship for followers of Islam. Muslims can come together there for "Salat", meaning prayer. In english a mosque is any building dedicated to Islamic worship.

Silk Road

The first use of the expression "Silk Road" actually "Silk Roads" appears to have been in German: Die Seidenstrassen. Geographer Baron Ferdinand von Richthofen (1833-1905) -- uncle of the Red Baron -- used the expression "silk roads" to describe the trade routes linking China, India, and the Mediterranean world via Central Asia.

Ancient Egypt

The ancient Egyptians built pyramids as tombs for the pharaoh's and their queens. The pharaohs were buried in pyramids of many different shapes and sizes from before the beginning of the Old Kingdom to the end of the Middle Kingdom.
There are about eighty pyramids known today from ancient Egypt. The three largest and best-preserved of these were built at Giza at the beginning of the Old Kingdom. The most well-known of these pyramids was built for the pharaoh Khufu. It is known as the 'Great Pyramid'.