Migraine most frequently causes simple visual hallucinations, but complex visual hallucinations may occur in basilar migraine and familial hemiplegic migraine. In contrast to hallucinations in migraine aura, complex visual hallucinations in basilar migraine appear at a late stage of an attack usually following symptoms of brainstem and cerebellar dysfunction or at recovery from coma.
The building of the Titanic took 2 years, 2 months. Construction  began on 31 March 1909. It was launched on 31 May 1911.   it took three years to completely construct anâ¦d outfit the titanic  but the building of the titanic was on march 31,1909 It took 2 years. From 1909 to 1911.
Work started on 'Titanic', at Belfast's Harland & Wolff Shipyards, on March 31st, 1909. The ship was launched on 31st May, 1911 and fitting out was completed on March 31st, 1912. After 3 days of sea trials, 'Titanic' set out for Southampton, from where she left on her maiden voyage to New York on 10th April, 1912. 'Titanic' sank, after a collison with an iceberg at 11.40pm Sunday 14th April, at 2.20am, Monday 15th April, 1912. The RMS Titanic took more than one year to build.