The Gens-d'arme Square is distinguished by the French and German churches, at least by their exterior,--by their high domes, columns, and porticoes. The interiors are small and insignificant. On this square stands also the royal theatre, a tasteful pile of great beauty, with many pillars, and statues of muses and deities. I ascended the tower on which the telegraph works, on account of the view over the town and the flat neighbourhood. A very civil official was polite enough to explain the signs of the telegraph to me, and to permit me to look at the other telegraphs through his telescope. The Konigstadt, situated on the opposite shore of the Spree, not far from the royal palace, contains nothing remarkable. Its chief street, the Konigsstrasse, is long, but narrow and dirty. Indeed it forms a great contrast to the town of Berlin in every thing; the streets are narrow, short, and winding. The post-office and the theatres are the most remarkable buildings. The luxury displayed in the shop-windows is very great. Many a mirror and many a plate-glass window reminded me of Hamburgh's splendour, which surpasses that of Berlin considerably. There are not many excursions round Berlin, as the country is flat and sandy. The most interesting are to the pleasure-gardens, Charlottenburg, and, since the opening of the railway, to Potsdam. The park or pleasure-garden is outside the Brandenburg-gate; it is divided into several parts, one of which reminded me of our fine Prater in Vienna. The beautiful alleys were filled with carriages, riders, and pedestrians; pretty coffee-houses enlivened the woody portions, and merry children gambolled on the green lawns. I felt so much reminded of my beloved Prater, that I expected every moment to see a well-known face, or receive a friendly greeting. Kroll's Casino, sometimes called the Winter-garden, is built on this side of the park. I do not know how to describe this building; it is quite a fairy palace. All the splendour which fancy can invent in furniture, gilding, painting, or tapestry, is here united in the splendid halls, saloons, temples, galleries, and boxes. The dining-room, which will dine 1800 persons, is not lighted by windows, but by a glass roof vaulted over it. Rows of pillars support the galleries, or separate the larger and smaller saloons. In the niches, and in the corners, round the pillars, abound fragrant flowers, and plants in chaste vases or pots, which transform this place into a magical garden in winter. Concerts and _reunions_ take place here every Sunday, and the press of visitors is extraordinary, although smoking is prohibited. This place will accommodate 5000 persons. That side of the park which lies in the direction of the Potsdam-gate resembles an ornamental garden, with its well-kept alleys, flower-beds, terraces, islets, and gold-fish ponds. A handsome monument to the memory of Queen Louise is erected on the Louise island here.