The first lock stitch sewing machine was invemted by

The first working lockstitch/sewing machine was invented by Englishman Thomas Saint in 1790. Lockstitch machines have long history of development, but the three inventors have been most important for development are Charles Fredrick Wiesenthal, Thomas Saint and William Newton Wilson. Charles Fredrick Wiesenthal invented the first patent for lockstitch machine, the design of the first working lockstitch machine was made by Thomas Saint which William Newton Wilson later improved improved.

Walter Hunt

The first  Lock stitch sewing machine was invented by Walter Hunt in the year 1832. His machine was comprised of an eye-pointed needle (with the eye and the point on the same end) carrying the upper thread and a falling shuttle carrying the lower thread.

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.