A Brief History of Architecture
1) [?] was evolved around 200 BC through Greek builders looking for a stronger bonding to replace weaker mortars such as gypsum plaster or bitumen. The Romans added finely ground volcanic lava and small fragments of volcanic rubble instead of clay, which made the much stronger 2) [?].

It was in the first century BC that the Greeks and the Romans were using 3) [?] and 4) [?] in their large buildings and structures. Lintels spanning these could reach seven yards at most, but the development of the 5) [?] meant the span could reach fifty yards. This great architectural achievement led to the 6) [?]. The Hagia Sophia, built in 537 AD, has a fine example of this stunning feature.

In other parts of Europe, the Gothic styles of architecture were used in church and cathedral construction from the 12th to the 15th century. These tall, imposing buildings often featured beautiful, 7) [?] windows, and their interiors were constructed using 8) [?], pointed 9) [?] and 10) [?].

The baroque and 11) [?] architecture of the 17th and 18th centuries brought art and sculpture into building construction, but in the mid-nineteenth century the potential of glass, iron and prefabrication was realized. The use of iron in building construction led to the modular steel-frame tradition of late 20th-century, which we still see today.

The only limit of the modern architecture designer nowadays is 12) [?].