I don't know if this is the right place, but it is definitely about classic telescopes.
Recently I visited the Lisbon Astronomical Observatory with one of our companions here on CN, mauigazer. I managed to book a one hour visit, that actually lasted a bit longer. The reason why I'm posting this visit is because I'm very curious about the manufacturer of the telescopes that were installed on this observatory: Repsold & Merz, Hamburg, Germany.
This observatory was commissioned around 1860, after long discussions in Paris, about parallax between the French astronomer Hervé Faye and William Struve, director of the Pulkova observatory in St. Petersburg. Faye came to the conclusion that the best place to observe and measure the star in question (#1830 Groombridge catalog) was Lisbon, Portugal, with an instrument specially designed by Faye for this purpose, a zenithal telescope. The news arrived fast to Portugal and D. Francisco de Almeida proposed in the parliament the construction of a new observatory, since the existing one belonged to the navy and was to close to the river, and was subject to fog. The king D. Pedro V agreed, gave some of his land and financed the project.
The project was developed by the French architect Jean-Francois Colson, and it is in fact a smaller copy of the Pulkovo observatory. The build started in 1861 and it was inaugurated in 1867. The main dome was also manufactured in Hamburg. William Struve helped choosing the equipment for the observatory.
The observatory has three main telescopes all manufactured by Repsold & Merz: A meridian telescope (135/2000mm), a zenithal telescope (160/2310mm) and a large refractor on the big central dome (380/7000mm).
There are other smaller refractors used for keeping time and teaching. Some of those small refractors have all very beautiful wooden tubes.
The construction is amazing, the piers for the meridian and zenithal telescopes are made with blocks of marble and are separated from the floor, both of these telescopes have a secondary housing that roll on tracks on the floor for protection of the instruments, even the gardens were planed to absorb the heat, and avoid heat plumes in it's surroundings.
Obviously I need to go back, one hour isn't enough to absorb so many instruments.
So, here are some pictures I took while visiting the observatory:
Obviously the mount needs some dusting, but it still moves very smoothly, I moved this several tons beast on the declination axis with a couple of fingers.