Metamorphogenic marbles
These marbles usually have a more favourable strength, abrasion and resistance to weather conditions than sedimentogenic…
Sedimentogenic marbles
Colour, which is much more varied than with metamorphogenic marbles, is an important feature of…
Types of Roman roads
The Roman roads were diverse, from simple roads to the above-mentioned paved ones using a solid…
Roman roads or all roads lead to Rome
In the last issue of the magazine “Quarries and Mining”, in the article “Where macadam…
Where does macadam come from? – Part Two
The Industrial Revolution A significant turnover for building new roads came with the period of…
Where does macadam come from? Part One
Pathways, footpaths, tracks, road, motorway, railways so called infrastructures are ”Industrial arteriae” which we cannot…
Mining in Obří důl (Giant Valley) – Part 2
Arsenic furnace In the 17th century Jacob de Waggi built so called ”poisonous furnace” for…
Mining in Obří důl (Giant Valley) – Part One
Speleologists from Horní Albeřice have been carrying out mining and geological surveys of old mines…
Hana Wichterlová – The first lady of Czech sculpture art
Hana Wichterlová, born March 2, 1903 and her ten-year younger brother Otto Wichterle, the inventor…
