Hello. My 4th-great-grandfather was Swiss engineer Gottlieb Koller who was appointed chief of the Swiss national railway office in the early 1850s. He was involved in the planning of the Gotthardbahn, especially the alpine crossing. I am wondering if you please, can anyone provide me any information you have on Gottlieb Koller? His birthplace and year, the date of his death and cause of death, or any other details you have? I would greatly appreciate it!