A single pair of swans glided serenely under the bridges of the river Ill as I walked to the premiere of the Opéra National du Rhin’s new production of Lohengrin in Strasbourg on Sunday.

Does “the practice of opera singing in Italy” need help from UNESCO, which has newly inscribed it on the “Representative List of the Intangible Cultural Heritage of Humanity”? Italian opera is surely immensely popular worldwide. But when it comes to practising the art properly, its greatest senior exponent, Riccardo Muti, powerfully argues that Verdi and Bellini, his most recent special projects in the city where he lives, Ravenna, need as much respect and care as Beethoven or Schubert.

In his final years Michael Powell mooted the possibility of a Bartók trilogy. He wanted to add to the growing popularity of his work on Bluebeard’s Castle, the deepest of one-act operas, an idea he had previously rejected of filming the lurid "pantomime" The Miraculous Mandarin and, as third instalment, not the earlier ballet The Wooden Prince but a film about the composer’s time in America and his return, after death, to Hungary.

Imagine a Glyndebourne season where all those promising young singers in the chorus get to be principals in a series of fringe operas. At Wexford, they already have their work cut out, though this year not so much in the three main rarities – hence the sheer joy of witnessing so many fine performances in Puccini’s Suor Angelica and Gianni Schicchi, Donizetti’s La fille du régiment and Rossini’s L’Italiana in Algeri.

“Visionary,” I’m told, is a clichéd word these days. But so long as you don’t fling it about too freely, it’s apt: for me, there are only two visionary directors working in opera right now. One is our own Richard Jones – though even he can get it wrong occasionally – and non-Czechs probably won’t know much about the other as yet.

Could this be the summer Bayreuth finally sees a new Ring production that comes anywhere near its last great epic success, Harry Kupfer’s, which ran from 1988-92? If so, it’s been pipped to the post by a rather more comfortable and bijou opera house on the other side of the lake to the refuges where Wagner worked on more masterpieces – beautiful sites both, even if the “asyl” next to the Villa Wesendonck is no more..

“I want to tell her that people will be good,” Tewodros Aregawe of Phosphoros Theatre confided to us as Little Amal closed her eyes on the giant bed made up for her in the Paul Hamlyn Hall, “that all the people with kind eyes who have walked alongside her and listened to her story will be louder than those who wish she wasn’t there”.

I only saw Christa Ludwig twice live in concert, but those appearances epitomise her incredible dramatic and vocal rage as well as her peerless artistry in everything she did. The first event was Schubert’s Winterreise with pianist Charles Spencer at the Southbank Centre, at a time when it was less common for women to take on the role of the heavy-hearted wayfarer: the intensity still resonates.

One source of advance information told us to expect a reduced version of Bartók’s one-act Bluebeard’s Castle, among the 20^th century’s most original and profound operatic masterpieces.

As more musicians emerge from lockdown to conduct, play and sing in audience-less venues - ongoing kudos to the Wigmore Hall for its weekday lunchtime concerts, a fixure for so many viewers and listeners - here are some more off-piste treasures, a past glory from the Royal Opera, a chance to vote for l