Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Defence Line of Amsterdam' has mentioned 'Brick' in the following places:
Occurrence Sentence Text Source
The invention of the high-explosive shell and the percussion fuze, which allowed ordnance to explode on impact and dislodge brick fortifications easily, necessitated a change from masonry to concrete forts.
The earlier ones were built of brick, the later of massed concrete.
It illustrates the transition from brick construction in the 19th century to the use of reinforced concrete in the 20th century.
The Outstanding Universal Value is expressed in the authenticity of the design (the typology of forts, sluices, batteries, line ramparts), of the specific use of building materials (brick, unreinforced concrete, reinforced concrete), of the workmanship (meticulous construction apparent in its constructional condition and flawlessness), and of the structure in its setting (as an interconnected military functional system in the human-made landscape of the polders and the urbanised landscape).