A method of fabricating a tubular fibrous architecture, the method comprising the following steps consisting in: a) forming pairs of bobbins (32, 42, 52, 62, 72) from threads, rovings, ribbons or bundles of threads, hereafter designated under the generic term Threads, each pair of bobbins being formed by winding a first part of a Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), from a first end of the Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), onto a first bobbin (32, 42, 52, 62, 72) of the pair and winding a second part of the Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), from the second end of the Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), onto the second bobbin (32, 42, 52, 62, 72) of the pair; b) placing the pairs of bobbins (32, 42, 52, 62, 72) on the spindles of a loom, the pairs of bobbins being arranged on the spindles as a function of a desired Primary Structure, c) forming the Primary Structure on the loom of step b), this Primary Structure corresponding to the bottom of the fibrous architecture; d) placing a support conforming with the tubular part of the fibrous architecture into position on a loom to support, position and maintain said Threads (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74) during their crossover at the next step; e) forming, using said Threads (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74) and the loom of step d), the tubular part of the fibrous architecture on the support, characterized in that the tubular fibrous architecture is partially or completely closed at one of its ends so that the junction between the bottom and the remainder of the tubular part exhibits a continuity of all the Threads (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74) and a transition of continuous geometry between the architecture of the bottom and that of the remainder of the tubular part. a) forming pairs of bobbins (32, 42, 52, 62, 72) from threads, rovings, ribbons or bundles of threads, hereafter designated under the generic term Threads, each pair of bobbins being formed by winding a first part of a Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), from a first end of the Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), onto a first bobbin (32, 42, 52, 62, 72) of the pair and winding a second part of the Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), from the second end of the Thread (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74), onto the second bobbin (32, 42, 52, 62, 72) of the pair; b) placing the pairs of bobbins (32, 42, 52, 62, 72) on the spindles of a loom, the pairs of bobbins being arranged on the spindles as a function of a desired Primary Structure, c) forming the Primary Structure on the loom of step b), this Primary Structure corresponding to the bottom of the fibrous architecture; d) placing a support conforming with the tubular part of the fibrous architecture into position on a loom to support, position and maintain said Threads (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74) during their crossover at the next step; e) forming, using said Threads (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74) and the loom of step d), the tubular part of the fibrous architecture on the support, characterized in that the tubular fibrous architecture is partially or completely closed at one of its ends so that the junction between the bottom and the remainder of the tubular part exhibits a continuity of all the Threads (31, 41, 43, 44, 51, 53, 54, 61, 63, 71, 73, 74) and a transition of continuous geometry between the architecture of the bottom and that of the remainder of the tubular part.