The Church of Saint-Nicolas with its little belfry in the Toulouse Gothic style sits in the Saint-Cyprien neighbourhood on the left bank of the Garonne. At its foot stands the great main door with overlapping arches, its lintel decorated with a Nativity scene. Inside, the visitor can admire the monumental retable designed in the 18th Century by the sculptor Rossat, in which are set three of the best paintings by the artist Despax (1709-1773) : the death of Saint Nicholas, his apotheosis and the Assumption of the Virgin. The nave is decorated with murals by Bernard Bénézet (1835-1897). In 1843, the organ builders Daublaine & Callinet and Cavaillé-Coll competed for the contract to rebuild the organ of Saint-Sernin. Daublaine & Callinet won and the contract was signed on the 19th of December 1843. While the Saint-Sernin organ was being installed, the Works Committee of Saint-Nicolas announced their intention to acquire a larger organ. Daublaine & Callinet suggested the organ that they were building for the Exhibition of May-June 1844, to be held in the Grand-Carré of the Champs-Élysées in Paris. A contract was signed on the 17th of July 1844 between Daublaine & Callinet and the Saint-Nicolas Works Committee for an organ, without a case, for the price of 25,000 francs. The contract specified that the instrument would be delivered no later than November 1844 and was to be completed by January 1845, the date agreed for the first payment. The old organ was immediately put up for sale. The Works Committee remained responsible for the case and published a call for tenders for its creation in August 1844. This contract was won by Louis Lacassin for the sum of 2,605 francs. He was also entrusted with the construction of the tribune for 2,004 francs and 30 centimes. The plans were laid out by the architect Louis Delors, responsible for overseeing the work. Reception of the organ, planned for the 15th of December 1844, was delayed until the following February. Before that date, however, the terrible fire which would ultimately lead to the collapse of Daublaine swept through the Church of Saint-Eustache in Paris (16th of December 1844). The instrument was received by Lefébure-Wély on the 28th of February 1845. He gave a concert on the 1st of March, which was followed by a collection to raise funds towards the cost of the organ. In May, the Works Committee requested a subsidy of 10,000 francs from the city to help pay for the organ. The City Council agreed to pay 7,500 francs to assist them. Faults in the organ's construction, no doubt due to the Maison Daublaine's misfortune and eventual bankruptcy (since taken over by Ducroquet), resulted in final reception being delayed until May 1846. The organ possessed 27 stops instead of the 29 originally planned. The old organ from the church of Saint-Nicolas was sold to Théodore Puget on the 4th of February 1846 for 1,500 francs. The organ case was installed at Seysses, with a brand new Puget organ inside it. In November 1850, a contest was held to find a replacement for the organist M. Picquié who had died in 1848. In 1857, the Works Committee of Saint-Nicolas decided to have the organ repaired and completed. It therefore called on Poirier & Lieberknecht who were fully familiar with the instrument. The wind system was renovated, the piping dusted out, the récit enlarged and improvements were made to the organ and its composition. On the récit, the Quintaton was replaced by a gamba, an octavin was added, as were a trumpet and the first twelve notes of the salicional, while a clairon was added to the pedalboard. The work, which cost 3,200 francs, lasted four months and the organ was delivered at the end of May 1857. In 1868 the organ was again renovated. A final campaign of work and modifications was undertaken by Maurice Puget in 1944, after which there was no more maintenance. Restoration was entrusted to the Giroud company (from Bernin, Isère) and was completed in 2005. The organ was inaugurated on the 11th, 12th and 13th of March 2005.